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Physics 1
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A 1400 kg car traveling at a speed of 34 m/s skids to a halt on wet concrete where μk = 0.50. How long are the skid marks?
7 answers
asked by
Logan
16,479 views
A taut string connects a 5-kg crate to a 12-kg crate (see figure below). The coefficient of static friction between the smaller
4 answers
asked by
Sarah
2,807 views
A steel wire in a piano has a length of 0.5000 m and a mass of 3.800 10-3 kg. To what tension must this wire be stretched in
4 answers
asked by
Emily
1,631 views
A toboggan slides down a hill and has a constant velocity. The angle of the hill is 5.50 with respect to the horizontal. What is
4 answers
asked by
J
3,147 views
A body of mass 6kg moving at 8m/s collides with a stationary body of mass 10kg and sticks to it. Find the speed of the composite
3 answers
asked by
Dan
1,062 views
A football is thrown upward at an 48◦
angle to the horizontal. The acceleration of gravity is 9.8 m/s^2. To throw an 80.4 m
4 answers
asked by
Dakota
2,162 views
A school teacher’s sedan can go from 0 to 25 m/s in only 4.0 seconds. What is the
acceleration of the sedan?
4 answers
asked by
nike
1,940 views
An object is thrown downwards with a 2.5 m/s speed from a 9.6m height. Determine the initial velocity (in m/s) with which
2 answers
asked by
Joel
209 views
A rock is thrown straight upward with an initial velocity of 9.6 m/s in a location where the acceleration due to gravity has a
7 answers
asked by
Aisumi
7,534 views
An astronaut in her space suit has a total mass of m1 = 76.9 kg, including suit and oxygen tank. Her tether line loses its
3 answers
asked by
Emily
3,074 views
In recent years, scientists have discovered hundreds of planets orbiting other stars. Some of these planets are in orbits that
3 answers
asked by
Skyler
1,700 views
A textbook of mass 1.95 kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose
4 answers
asked by
David
3,520 views
After each bounce, a ball reaches 1/2 the height of the previous bounce. First to second bounce = 1 second. How long between the
6 answers
asked by
Alec
1,098 views
A subway train starts from rest at a station and accelerates at a rate of 1.60m/s^2 for 14.0 s. It runs at constant speed for
4 answers
asked by
an
1,236 views
A hot-air balloonist, rising vertically with a constant velocity of magnitude v = 5.00 m/s, releases a sandbag at an instant
2 answers
asked by
an
1,008 views
The label on a candy bar says 470 Calories.
Assuming a typical efficiency for energy use by the body, if a 74 person were to use
2 answers
asked by
Naso
877 views
Forces of 20 N at 80 degrees, and 50 N at an angle of 210 degrees, measured counter-clockwise from the positive x-axis, act on
2 answers
asked by
Fallon
558 views
A 0.620 kg basketball is dropped out of a window that is 6.40 m above the ground. The ball is caught by a person whose hands are
1 answer
asked by
Fallon
476 views
A 64.9 kg skier coasts up a snow-covered hill that makes an angle of 25.4° with the horizontal. The initial speed of the skier
1 answer
asked by
Fallon
1,040 views
The cartesian coordinates of a point in the xy plane are x= -3.64 m, y = -1.75 m.
1. Find the distance, r, from the point to the
2 answers
asked by
Kailey
810 views
There are six books in a stack, and each book weighs 5 N. The coefficient of static friction between the books is 0.2. With what
4 answers
asked by
Aisumi
1,404 views
What is the minimum speed a 3,200 pound car can have on a flat road when going around a curve with a radius of 300ft. Take the
1 answer
asked by
Lindsey
410 views
What is the minimum speed that a roller coaster must have so that the people do not fall out at the top of the circle in an
2 answers
asked by
Lindsey
1,277 views
A meter stick has a mass of 200g and its center of gravity is at the 50.0 cm mark. If 150g is attached to the stick at the 10 cm
1 answer
asked by
Lindsey
799 views
(II) How close to the edge of the 20.0-kg table shown in Fig. 9–47 can a 66.0-kg person sit without tipping it over?
3 answers
asked by
Jerome
1,341 views
Chap. 11, #16. (II) A 0.60-kg mass vibrates according to the equation where x is in meters and t is in seconds. Determine (a)
3 answers
asked by
jerome
766 views
From the top of a cliff overlooking a lake, a person throws two stones. The two stones have identical initial speeds of v0 =
4 answers
asked by
Hiya
1,466 views
At t = 0, a stone is dropped from a cliff above a lake; 1.3 seconds later another stone is thrown downward from the same point
2 answers
asked by
PhysicsGuy
590 views
A mass of 17 kg is placed on a frictionless incline which is inclined at an angle of 59 degrees above the horizontal. It is held
2 answers
asked by
Jon
498 views
A mass of 11 kg is being pushed up a frictionless incline with a constant force of 35 Newtons directed parallel to the incline,
3 answers
asked by
Jon
841 views
A mass of 8 kg lies on a horizontal, frictionless floor. A force of 53 Newtons pushes to the left (negative x direction) with a
2 answers
asked by
Jon
565 views
A mass of 5.2 kg lies at the top of a frictionless incline. It is inclined at an angle such that the normal force on the mass is
1 answer
asked by
Jon
400 views
A mass of 5 kg lies on a frictionless, horizontal floor. A force of 135 Newtons is applied to the mass at an angle above the
1 answer
asked by
J
648 views
A mass of 5.2 kg lies at the top of a frictionless incline. It is inclined at an angle such that the normal force on the mass is
1 answer
asked by
J
465 views
A 50.0-kg block and 100-kg block are connected by a string as in Figure P8.36. The pulley is frictionless and of negligible
5 answers
asked by
Anonymous
1,322 views
Three charges are fixed to an xy coordinate system. A charge of +16C is on the y axis at y = +3.1 m. A charge of -16C is at the
3 answers
asked by
Beth
1,993 views
A school teacher’s sedan can go from 0 to 25 m/s in only 4.0 seconds. What is the
acceleration of the sedan?
4 answers
asked by
nike
432 views
A jetliner is moving at a speed of 305 m/s. The vertical component of the plane's velocity is 38.9 m/s. Determine the magnitude
1 answer
asked by
Anonymous
376 views
A mountain-climbing expedition establishes two intermediate camps, labeled A and B in the drawing, above the base camp. (x1 =
1 answer
asked by
Anonymous
1,060 views
A bird watcher meanders through the woods, walking 0.45 km due east, 0.80 km due south, and 2.05 km in a direction 43.0° north
1 answer
asked by
Anonymous
629 views
A major-league pitcher can throw a baseball in excess of 40.6 m/s. If a ball is thrown horizontally at this speed, how much will
1 answer
asked by
Anonymous
428 views
A bullet is fired from a rifle that is held 2.0 m above the ground in a horizontal position. The initial speed of the bullet is
1 answer
asked by
Anonymous
445 views
A 1720-kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring
1 answer
asked by
Anonymous
357 views
6. –/1.5 points CJ8 4.P.014. My Notes | .
Question Part Points Submissions Used 1 2 –/1 –/0.5 0/7 0/1 Total –/1.5 When a
1 answer
asked by
Donald
467 views
Two small particles of mass 16 kg and 27 kg are a distance 1.4 m apart. What is the gravitational force of one of these
1 answer
asked by
John
346 views
Find the ratio of your weight on the Earth to your weight on the surface of the Earth's Moon.
WEarth/WEarth's Moon=
1 answer
asked by
John
437 views
The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a
1 answer
asked by
John
451 views
The hard disk in a laptop computer contains a small disk that rotates at a rate of 5000 rpm. If this disk has a radius of 2.3
4 answers
asked by
John
1,110 views
This is a repost....:Two small particles of mass 16 kg and 27 kg are a distance 1.4 m apart. What is the gravitational force of
4 answers
asked by
John
394 views
The hard disk in a laptop computer contains a small disk that rotates at a rate of 5000 rpm. If this disk has a radius of 2.3
1 answer
asked by
John
613 views
Find the ratio of your weight on the Earth to your weight on the surface of the Earth's Moon.
WEarth/WEarth's Moon=
3 answers
asked by
John
314 views
The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a
3 answers
asked by
John
472 views
A crate of mass 42 kg is pushed across a level floor by a person. If the person exerts a force of 20 N in the horizontal
1 answer
asked by
John
474 views
A crate of mass 48 kg is pushed up a frictionless ramp by a person as shown in the figure below. Calculate the work done by the
1 answer
asked by
John
480 views
Two railroad cars, each of mass 2.2 104 kg, are connected by a cable to each other, and the car in front is connected by a cable
1 answer
asked by
John
448 views
A car is pushed along a long road that is straight, horizontal, and parallel to the x direction.
a)The horizontal force on the
1 answer
asked by
John
979 views
A horizontal force of 30 N pulls a block of mass 2.5 kg across a level floor. The coefficient of kinetic friction between the
3 answers
asked by
John
524 views
A skier of mass 109 kg travels down a frictionless ski trail.
a)If the top of the trail is a height 218 m above the bottom, what
2 answers
asked by
John
528 views
Consider a roller coaster that moves along the track shown in the figure below. Assume all friction is negligible and ignore the
1 answer
asked by
John
642 views
The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W =
1 answer
asked by
Donald
506 views
The drawing shows a wire tooth brace used by orthodontists. The topmost tooth is protruding slightly, and the tension in the
2 answers
asked by
Donald
926 views
A shot-putter puts a shot (weight = 71.3 N) that leaves his hand at distance of 1.62 m above the ground.
(a) Find the work done
2 answers
asked by
Anonymous
594 views
The skateboarder in the drawing starts down the left side of the ramp with an initial speed of 5.4 m/s. If nonconservative
1 answer
asked by
Donald
925 views
A catapult 100 m long launches a 3.0 x 10^4 kg jet from the deck of a carrier. Starting at rest, the plane takes off with a
1 answer
asked by
John
349 views
Consider an airplane wing of area 15 m2. The airflow speed over the top of the wing is 205 m/s, while the speed across the
1 answer
asked by
Dave
482 views
The period of oscillation for a mass-on-a-spring system is 0.14 s. If m = 3.9 kg, what is the spring constant of the spring?
1 answer
asked by
Johnvon
341 views
Consider a simple pendulum of length 1.1 m with
m = 2.9 kg. If the amplitude of the oscillation is 0.11 m (as measured along the
2 answers
asked by
Johnvon
758 views
The antinode of a standing wave is 0.052 m away from the nearest node. What is the wavelength of the waves that combine to make
1 answer
asked by
Dave
470 views
A ball starts from rest and rolls down a hill with uniform acceleration, traveling 150 m during the second 5.0 s of its motion.
2 answers
asked by
Heather
1,275 views
A coin rests 12.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface
1 answer
asked by
Emily
882 views
A mass m1 = 4.9 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 =
1 answer
asked by
Brandon
859 views
(I) determine the tangential and centripetal components of the net force excreted on the car(by the ground) when it accelerates
1 answer
asked by
Martin
725 views
(I) determine the tangential and centripetal components of the net force excreted on the car(by the ground) when it accelerates
3 answers
asked by
Martin
781 views
A criminal is escaping across a rooftop and runs off the roof horizontally at a speed of 5.0 m/s, hoping to land on the roof of
2 answers
asked by
anonymous
665 views
On a spacecraft, two engines are turned on for 910 s at a moment when the velocity of the craft has x and y components of v0x =
2 answers
asked by
anonymous
652 views
Suppose the water at the top of Niagara Falls has a horizontal speed of 2.59 m/s just before it cascades over the edge of the
2 answers
asked by
anonymous
547 views
Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. The mass of the
1 answer
asked by
Anonymous
657 views
The drawing shows three particles far away from any other objects and located on a straight line. Particle B is located in the
2 answers
asked by
Erica
2,133 views
If you see an object rotating, is there necessarily net torque acting on it? Explain
2 answers
asked by
Timothy
681 views
Two balls have the same size and mass. One is hollow, the other one is solid. How would you determine which is which without
2 answers
asked by
Timothy
958 views
What is the rotational kinetic energy of the Earth in its orbit around the sun?
2 answers
asked by
Sally
753 views
What torque is needed to accelerate a 70Kg disk with a 20 cm radius from rest to 10 rad/s?
1 answer
asked by
Sally
379 views
A cart with mass 340 g moving on a frictionless linear air track at an initial speed of 1.5 m/s undergoes an elastic collision
3 answers
asked by
Alex
1,113 views
You are to drive to an interview. The interview is at 11:15 a.m. You plan to drive at , so you leave at 8:00 a.m. to allow some
2 answers
asked by
Alex
559 views
A golf ball is struck with a five iron on level ground. It lands 92.0m away 4.20s later. What was (a) the direction and (b) the
1 answer
asked by
Molly
589 views
A block is given an initial velocity of 9.00 m/s up a frictionless incline of angle θ = 21.0°. How far up the incline does the
1 answer
asked by
Julie
814 views
A disk rotates with constant angular acceleration. The initial angular speed of the disk is 2π rad/s. After the disk rotates
2 answers
asked by
Nat
1,013 views
a piece of stone was dropped from the top of the building. the stone took 10 s to hit the ground. what is the veocity of the
1 answer
asked by
Marvin I. Rojas
355 views
Monique has a mass of 46 kg and she is sitting on a swing that hangs 0.50 m above the ground. Pierre pulls the swing back and
2 answers
asked by
Brittany
737 views
A sled is initially given a shove up a frictionless 37.0∘ incline. It reaches a maximum vertical height 1.45m higher than
4 answers
asked by
Anonymous
620 views
A bicycle tire has a mass of 2.54 kg and a radius of 0.346 m.
(a) Treating the tire as a hoop, what is its moment of inertia
2 answers
asked by
Gina
504 views
A man opens a 1.14-m wide door by pushing on it with a force of 49.5 N directed perpendicular to its surface.
(a) What magnitude
1 answer
asked by
Gina
1,021 views
A rotating cylinder about 5.0 miles in diameter is designed to be used as a space colony. With what tangential velocity must it
2 answers
asked by
Brittany
678 views
A car manufacturer claims that you can drive its new vehicle across a hill with a 47 degree slope before the vehicle starts to
3 answers
asked by
Chris
1,570 views
A golf ball of mass 125 g hits a billiards ball of mass 172.5 g that is initially at rest. After the collision, the golf ball
2 answers
asked by
David
1,151 views
A 50 kg cannonball hits a war tank vehicle of 12,000 kg that is initially at rest. The cannonball embeds in the tank and both
3 answers
asked by
David
1,334 views
a 12.5 m long string vibrates as 100 hertz standing wave with nodes at 1.0m and 1.5m from one end of the string and at no points
2 answers
asked by
David
540 views
A 2.5 meter long string vibrates as a 100 hertz standing waves with nodes at 1.5 meters and 1.0 meters from one end of the
2 answers
asked by
Derrick Ngugi
596 views
a skier of mass 70.0kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 60.0 m up a
2 answers
asked by
Brisa
856 views
In coming to a stop, a car leaves skid marks 62 m long on the highway.Assuming a deceleration of 4.30 m/s2 , estimate the speed
4 answers
asked by
Anonymous
1,917 views
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