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Physics
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After falling for 15.38 s a skydiver reaches terminal speed. If the skydiver is falling straight down, what is her acceleration?
7 answers
asked by
Cameron Lawrence
1,585 views
A skydiver jumps out of a plane and reaches her terminal speed of 120 mph after falling for 15 s. How fast will the skydiver be
5 answers
asked by
Cameron Lawrence
969 views
Correctly identify what will happpen in the following situations.
An object falling straight down at a speed higher than its
3 answers
asked by
Cameron Lawrence
753 views
A car starts at a position of x=7 m and has a speed of 2 mph. After 85 s the car has a speed of 28 mph. Determine the magnitude
2 answers
asked by
Jon Tres
504 views
Which of the following values COULD be a magnitude? Choose all that apply.
1. -109 2. 0 3. 0.024 4. 44.3 5. -3.81 6. 183 7. 68
2 answers
asked by
Jon Tres
699 views
A person throws a rock straight up into the air. At the moment it leaves the person's hand it is going 95 mph. When the rock
2 answers
asked by
Jon Tres
483 views
A horse canters away from its trainer in a straight line, moving 110 m away in 16.0 s. It then turns abruptly and gallops
3 answers
asked by
Jon Tres
519 views
Match the unit with what it measures.
mi/d2 yd y in/d Speed Displacement Acceleration Time
1 answer
asked by
Cameron Lawrence
305 views
Which of the following statements are TRUE? Choose all that apply. [HINT: The statements that are false should contradict
1 answer
asked by
Cameron Lawrence
1,339 views
Which of the following are the correct units for ACCELERATION? Choose all that apply.
m/s2 h mm mm/d2 pc mi NM yd/d km ft/s cm
2 answers
asked by
Cameron Lawrence
524 views
An object of mass 80kg moving with velocity 2m/s hit by collideswith another object of mass 20kg moving with velocity 4m/s find
4 answers
asked by
Mateti
1,992 views
A car moving at 45ms-1 and then comes to rest in 5 seconds. Calculate the deceleration of the car.
3 answers
asked by
Anonymous
383 views
Suppose an astronaut drops a feather from 1.1 m above the surface of the moon. If the acceleration due to gravity on the moon is
2 answers
asked by
Student
753 views
The x axis of a trajectory represents its ____________.
Height in the vertical direction. Displacement in the horizontal
7 answers
asked by
Babygirl
1,719 views
PLEASE HELP!
A person throws a rock horizontally off a cliff ata a speed of 9 m/s from a point 64.8 m above the ground. How long
3 answers
asked by
Babygirl
2,251 views
4. Which of the following is an accurate statement about vectors?
A. Rotating a vector about an axis passing through the tip of
2 answers
asked by
Babygirl
1,137 views
Which statement reagarding the idealized model of motion called free fall is true?
A. A freely falling object has a constant
3 answers
asked by
Babygirl
2,289 views
While John is traveling along a straight interstate highway, he notices that the mile marker reads 247 km. John travels until he
3 answers
asked by
Adriana
815 views
You walk 45 m to the north, then turn 90 degrees to your right and walk another 45 m. How far are you from where you originally
4 answers
asked by
Babygirl
1,623 views
A boy and a man carry uniform rod of length l horizontally in such a way that the boy get 1/4of the load.if the boy is at one
7 answers
asked by
Anonymous
2,517 views
Which is not expecting acceleration?
A point on the outside of a spinning top whose rotational speed is constant. A skydiver
2 answers
asked by
Babygirl
687 views
A man pushes with a force of 310 N on a box at an angle of 55 degrees to the floor. How much of the force is directed into the
4 answers
asked by
Babygirl
1,240 views
Which is not expecting acceleration?
A point on the outside of a spinning top whose rotational speed is constant. A skydiver
2 answers
asked by
Babygirl
674 views
I really cannot understand how to get to the answer. Thank you!
Two cars are traveling, Car A is behind the other, on a straight
4 answers
asked by
Darius
2,380 views
1. Which is NOT true about the variables in the relationship F = ma?
Acceleration is directly proportional to mass. Force is
3 answers
asked by
Babygirl
3,101 views
If a rock takes 0.750 s to
hit the ground after being thrown down from a height of 4.80 m, determine the rock’s initial
2 answers
asked by
Anonymous
1,289 views
If you were to push a pile of books across a table, in which location would this be the easiest?
The moon(my choice) Earth Same
4 answers
asked by
Pookie
1,333 views
Stephanie hits a volleyball from a height of 0.80 m and gives it an initial velocity of 7.6 m/s straight up.
a) how high will the
4 answers
asked by
Annoooonymisuue
2,325 views
A 60 kg block weighs 132 lb on Earth. If the block were transported to a planetary body that had a BIGGER free fall acceleration
2 answers
asked by
Cameron
847 views
A hockey puck is observed to be sliding along a flat frictionless surface at a speed of 42 mm/s. There is no net force acting on
2 answers
asked by
Cameron
924 views
A ball is being twirled in a circle. If the string breaks and we IGNORE gravity, what path will the ball follow after the string
2 answers
asked by
Cameron
1,031 views
Your textbook is transported from Earth to the Moon. Which of the following statements is true?
1. The mass of your textbook will
2 answers
asked by
Cameron
774 views
Which of the following statements are IMPOSSIBLE? Choose all that apply
1. A pencil exerts a smaller gravitational force upon
3 answers
asked by
Cameron
882 views
A 100 kg fullback is running at 3.4 m/s to the East. What is the momentum of the fullback?
4 answers
asked by
Cameron
498 views
Calculate the speed of a satellite moving in a circular orbit about the Earth at a height of 2700×103 m. The mass of the Earth
2 answers
asked by
Cameron
539 views
Calculate the gravitational force between the Sun and an object. The mass of the Sun is 1.99×1030 kg. The mass of the object is
2 answers
asked by
Cameron
581 views
Calculate the gravitational force between the Sun and an object. The mass of the Sun is 1.99×10^30 kg. The mass of the object
2 answers
asked by
Cameron
497 views
Calculate the speed of a satellite moving in a circular orbit about the Earth at a height of 2700×10^3 m. The mass of the Earth
3 answers
asked by
Cameron
568 views
A truck travels up a hill. With a 6.5 incline the truck has a constant speed of 17 m/s what is the horizontal component of the
2 answers
asked by
Nathan
1,117 views
Calculate the speed of light in ethyl alcohol (n=1.52).
3 answers
asked by
Enalah
466 views
A bomb dropped from a balloon reaches the ground in 30seconds .determine the height of the balloon if it is at rest in the air
3 answers
asked by
Precious
1,900 views
A suitcase has a mass of 14.4kg. A man lifts the suitcase off the floor by exerting a vertical force of 170N on the suitcase.
3 answers
asked by
Anonymous
998 views
A box slides down a smooth plane (f=0) which is inclined at 20.0° above the horizontal. What is the acceleration of the box?
3 answers
asked by
Anonymous
985 views
How many arrows of force would be needed in a free body diagram of a rocket taking off from the moon? Ignore any solar system
1 answer
asked by
BlessedGalPal
857 views
A 525-g book is placed on a wooden plank which is at an angle of 35.0° to the horizontal. After the book is released, it is
2 answers
asked by
Eskimo
556 views
At the moment car A starts from rest and accelerates at 4.0 m/s^2, car B passes it, moving at a constant speed of 28 m/s. how
2 answers
asked by
Joyce
829 views
Rank the magnitude of the change in momentum of a ball from largest to smallest in the following situations:
a) The ball is
4 answers
asked by
alison
2,923 views
A 53008 lb force is applied to a surface that measures 89 in long and 21 in wide. Determine the pressure exerted on the surface
1 answer
asked by
Cameron
340 views
A car has a velocity of 14.2m/s^2 when the driver decides to accelerate at 6.80m/s^2 for 2.40s. The initial position of the car
1 answer
asked by
Anonymous
436 views
A runner follows a straight line path. He reaches the 100m mark (xₒ = 100m) with a velocity of 2.29m/s, then slows down
4 answers
asked by
Anonymous
387 views
A ball is dropped from the top of a building which is 39.2m above the level of the sidewalk.
How long does it take for the ball
2 answers
asked by
Anonymous
516 views
A ball is thrown down from the top of a building with a speed of 19.6m/s. The top of the building is 39.2m above the level of
2 answers
asked by
Anonymous
845 views
A girl standing on a bridge drops a stone over the side of the bridge. The stone strikes the water below the bridge 5.00s after
1 answer
asked by
Anonymous
734 views
A standard brass cylinder which has a mass of 2.00kg stands on a table. A girl ties a string to the cylinder and exerts a
1 answer
asked by
Anonymous
391 views
A car which has a mass of 1.36 tonnes is travelling at 26.8m/s on a level road when the driver brings the car to an emergency
2 answers
asked by
Anonymous
771 views
A helicopter has a mass of 4280kg. The helicopter is lifted off the ground with a vertically upward acceleration of 2.030m/s^2.
2 answers
asked by
Anonymous
963 views
how to solve this? the answer key says 10 floors (11 + the ground floor)
An elevator starts from rest at the ground floor of the
2 answers
asked by
Beyonce
525 views
A box which has a mass of 90.8kg is at rest on a rough horizontal floor, A man pushes on the box with a horizontal force of
2 answers
asked by
btsARMY
761 views
A car which has a mass of 1.36 tonnes is travelling at 26.8m/s on a level road when the driver brings the car to an emergency
1 answer
asked by
exo-L
503 views
A runner follows a straight line path. He reaches the 100m mark with a velocity of 2.29m/s, then slows down steadily
1 answer
asked by
physics
380 views
A ball is dropped from the top of a building which is 39.2m above the level of the sidewalk. How long does it take for the ball
1 answer
asked by
help
423 views
Calculate the magnitude of each force acting on the sleigh. The friction force has a magnitude of 4000N. The sleigh has a mass
2 answers
asked by
Cheese
753 views
The radius of the planet Venus is nearly the same as that of the earth, but its mass is only 80% that of the earth, if an object
3 answers
asked by
Joseph
551 views
Which of the following are formulas for power? Choose all that apply.
p = mv P = I^2R PV = nRT P = F/A P = Dgh P =
2 answers
asked by
Cameron
661 views
Calculate how much pressure (due to the liquid) would be on a 83 kg person if they were 53 m deep in...
a.)...freshwater. The
2 answers
asked by
Cameron
506 views
A car accidently rolls off a cliff.as it leaves the cliff has a horizontal velocity of 113m/s it hits the ground 60m from the
4 answers
asked by
Riir
674 views
A ball is thrown horziontally from the top of 40m high hill.it strickes the ground at the angle of 45°with.what is speed was
1 answer
asked by
Riir
420 views
Calculate the kinetic energy of an elephant (mass = 5 tonnes) charging at a speed of 36km/h.
2 answers
asked by
help
530 views
Calculate the change in kinetic energy of a 2.50kg cat slowing down from 1.00m/s to 0.500m/s.
2 answers
asked by
help
553 views
A 67.5kg skier slides down a 20° slope whose vertical height is 125m. What is the variation of the potential energy of the
3 answers
asked by
help
528 views
Calculate how much a 1.1 m slab of lead will expand if heated from -68 °C to 26 °C. Express your answer in m, cm, & in.
1 in =
1 answer
asked by
Cameron
354 views
Calculate how much heat is required to bring 157 g of water from a temperature of 89.8°C to a temperature of 100°C. The
2 answers
asked by
Cameron
559 views
Which of the following are acceptable units for pressure? Choose all that apply.
atm lb N N/m2 kg kg/L psi tons Pa
4 answers
asked by
Cameron
957 views
Which of the following are acceptable units for buoyant force? Choose all that apply.
psi lb tons Pa kg/L kg N atm N/m2
7 answers
asked by
Cameron
1,392 views
A person places an object in a swimming pool. He sees the object 15 cm far , if the water had a refractive index of 1.5 what is
1 answer
asked by
somayee
327 views
Calculate how much a 1.1 m slab of lead will expand if heated from -68 °C to 26 °C. The coefficient of thermal expansion for
1 answer
asked by
Cameron
421 views
On a hot summer day, a young girl swings on a rope above the local swimming hole. When she lets go of the rope her initial
4 answers
asked by
sjhfb
851 views
An incompressible box is completely submerged in MERCURY at a depth of 13 yd. The MERCURY density is the same at all depths. As
2 answers
asked by
Cameron
549 views
A brick is completely submerged in SALTWATER (D = 1.03 kg/L). The brick experiences a buoyant force of 193 oz. What is the
1 answer
asked by
Cameron
480 views
A 40 kg sample of ALUMINUM is undergoing SUBLIMATION. How much does the temperature change during this process?
1 answer
asked by
Cameron
395 views
A 63 kg rock with a volume of 42 L is completely submerged in water. The density of water is 1 kg/L.
a.) What volume of water is
2 answers
asked by
Cameron
506 views
A brick is completely submerged in SALTWATER (D = 1.03 kg/L). The brick experiences a buoyant force of 193 oz. What is the
3 answers
asked by
Cameron
534 views
A tether ball tied to a pole by a rope swings in a circular path with centripetal acceleration of 2.7m/s. If the ball has a
4 answers
asked by
Anonymous
2,217 views
A points source of light is placed at the bottom of jar having a liquid of refractive index 5/3.An opaque disc of radius 1.0 cm
2 answers
asked by
Anonymous
615 views
A roller coaster starts at a height of 43.0m. The tracks have a total of 400m. What is the work done by the normal force over a
1 answer
asked by
help
363 views
A 1000kg elevator is carrying 10 people at a constant velocity over a distance of 30.0m. Assuming the average mass of a person
1 answer
asked by
physics
389 views
A flat 100kg rock slides down a smooth rocky hill. It started from rest. The hill is 100m long and 50m high. The friction force
3 answers
asked by
physics
664 views
A construction hoist does 2.74x10⁴J of work in lifting a load of bricks from the street to the roof of a building. The roof is
3 answers
asked by
physics
584 views
A car has a potential energy of 2.00x10⁵J when the dar has a speed of 14.0m/s. Calculate the kinetic energy of the car when
3 answers
asked by
physics
332 views
A rough inclined plane makes an angle of 30.0° above the horizontal and is 4.00m long measures along the slope. A block which
2 answers
asked by
Energetic Joules
505 views
A smooth inclined plane is 6.00m long. The top end of the plane is 1.50m above the bottom end of the plane. A box which has a
3 answers
asked by
Anonymous
1,324 views
HELP :)
A man who is standing on the roof of a building throws a baseball vertically downward toward the sidewalk at a speed of
4 answers
asked by
Anonymous
892 views
Alisha starts pulling (from rest) a box full of books on a horizontal floor. She has tied the rope to the box, the rope makes an
2 answers
asked by
Anonymous
821 views
A rough inclined plane makes an angle of 30.0° above the horizontal and is 4.00m long measures along the slope. A block which
3 answers
asked by
Anonymous
674 views
A father skating pushes a baby in a cart over a distance of 100m. The father starts from rest and wants to reach a speed of
3 answers
asked by
Anonymous
524 views
A ball is thrown from a cliff of 10m with an initial velocity of 2.00m/s. What is the velocity of the ball just before it hits
1 answer
asked by
Anonymous
427 views
A pirate starts at point A, takes 54 paces due west, turns and takes 34 paces due south, then turns again and takes 12 paces due
3 answers
asked by
Simran
911 views
A tennis ball machine fires a ball vertically upwards at time t=0 at 19.6 m/s. Assume that air resistance is negligible and take
7 answers
asked by
Chernet
3,900 views
The steam point and the ice point of a mercury thermometer are wrongly marked as 92 and 2 resp. The correct temperature read by
3 answers
asked by
ManU
765 views
A stone whirled at the end of a rope 25cm long make 5 complete revolution in 3 seconds. Find the angular velocity.
4 answers
asked by
Anonymous
507 views
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