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Energy and Work
Page 3
Questions (241)
How many grams of carbohydrate does a person of mass 75 kg need to metabolize to climb five flights of stairs (15 m height
2 answers
asked by
Nasir
494 views
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?(1 point)
Responses 60% 60% 32% 32%
3 answers
asked by
Answer
50 views
A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before
1 answer
asked by
Allen
390 views
A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before
1 answer
asked by
Allen
410 views
what is an easy way to remember the equations used for: kinetic energy, potential energy, work, and power?
1 answer
asked by
caylanne
340 views
A 60 Kg skier leaves the end of a ski-jump ramp with a velocity of 24m/s directed 25° above the horizontal. Suppose that as a
2 answers
asked by
Anonymous
996 views
A 3.6-kilogram block sliding down a ramp from a height of 4.6 meters above the ground reaches the ground with a kinetic energy
1 answer
asked by
Purti
431 views
How much power does it takes to do 104 J of work in 8 seconds
2 answers
asked by
Andy
810 views
Which statement about friction in a system is true?(1 point)
Responses Friction increases the total energy of a system. Friction
3 answers
asked by
9265
41 views
A 0.49 kg ladle sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (k = 640 N/m) whose
1 answer
asked by
Vipre
362 views
After falling from rest from a height of 34 m, a 0.47 kg ball rebounds upward, reaching a height of 24 m. If the contact between
2 answers
asked by
halley
485 views
Last question:
An average person expends ~100 kj to walk 1km. How far will the average car travel by the time it expends the same
2 answers
asked by
Amy~
519 views
If the larger boulder has a mass of 50 kg and a height of 150 m from the ground what is its GPE?
3 answers
asked by
lexie
355 views
Posted by Ceres on Wednesday, September 23, 2009 at 4:07pm.
The question is: "A block of ice at 0oC is dropped from a height that
3 answers
asked by
Ceres
579 views
Distinguish between work,energy and power. If a body of weight 10 Newton is lifted from the floor to table 2 meter above the
3 answers
asked anonymously
42 views
In exercising, a weight lifter loses 0.100 kg of water through evaporation, the heat required to evaporate the water coming from
1 answer
asked by
Mary
656 views
In Figure 9-61, block 1 (mass 2.0 kg) is moving rightward at 8 m/s and block 2 (mass 4.8 kg) is moving rightward at 2.8 m/s. The
3 answers
asked by
John
3,855 views
A rain cloud contains 2.66 x 10^7 kg of water vapor. How long will it take for a 2.00 kW pump to raise the same amount of water
3 answers
asked by
arriell
2,519 views
Two cars travel at the same speed, so that they move 105 km in one hour. One car, a sleek
sports car, has a motor that delivers
3 answers
asked by
Gullu
1,704 views
In preparation for shooting a ball in a pinball machine,a spring (K=675N/m) is compressed by 0.0690m relative to its unstrained
2 answers
asked by
Cavin
1,684 views
A block of mass 12.0 kg slides from rest down a frictionless 35.0° incline and is stopped by a strong spring with k = 1.50 104
3 answers
asked by
beth
1,699 views
A car travels at a speed of 25 m/s on a flat stretch road. The driver must maintain pressure on the accelerator to keep the car
3 answers
asked by
Rachel.
1,641 views
36.A 50.0-kg block and 100-kg block are connected by a string. The pulley is frictionless and of negligible mass. The
5 answers
asked by
Noor
1,392 views
If you push a box for a distance of 1 meter with a force of 4.187 newtons, how many calories have been used?
1 calorie= 4.187
3 answers
asked by
BrainyBird
1,351 views
how far will 490 J raise a block weighing 7 N?
2 answers
asked by
Melany
1,295 views
A pinball machine has a spring with spring constant of 125N/m. A 65g ball is placed on the spring and the spring is compressed
1 answer
asked by
Sash
1,173 views
A new event has been proposed for the Winter Olympics. An athlete will sprint 150.0 m, starting from rest, then leap onto a 20.8
2 answers
asked by
Anonymous
1,165 views
A car's engine is only 12% efficient at converting chemical energy in gasoline into mechanical
energy. If it takes 1.8 x 104 N of
1 answer
asked by
Lily
1,154 views
A man drinks a bottle of beer and proposes to work off it's 460 kj by exercising with a 20-kg barbell. If each lift of the
3 answers
asked by
Aly
1,129 views
A 1.0 kg puck sliding at 15 m/s along some horizontal frictionless ice strikes and compresses a horizontal spring attached to
5 answers
asked by
grey
1,089 views
A block of mass 0.05 kg is pushed against a spring with spring constant k = 25 N/m. The spring is compressed 0.1m from its
2 answers
asked by
cocoabeanz
1,058 views
Two Earth satellites, A and B, each of mass m = 960 kg, are launched into circular orbits around the Earth's center. Satellite A
2 answers
asked by
Kensey
1,070 views
A 65.0 kg skier with an initial speed of 11.0 m/s coasts up a 2.50 m high rise as shown in Figure 6.23. Find his final speed at
1 answer
asked by
Andrew
1,024 views
You are at the park. You are going to analyze a roller coaster. You ask the attendant for the height of the first hill and find
2 answers
asked by
Help!
1,006 views
A 0.409 kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 19.5 N/m. The
3 answers
asked by
Physics
1,027 views
A(n) 80.0-kg student eats a 160-Calorie doughnut. To burn-it-off, he decides to climb the steps of a tall
building. How high (in
1 answer
asked by
Anonymous
1,017 views
As shown in the figure below, two masses m1 = 4.40 kg and m2 which has a mass 80.0% that of m1, are attached to a cord of
1 answer
asked by
Young
1,035 views
true or false
1. The work required to stretch a spring changes linearly with the amount of strech? 2. The kinetic energy of an
2 answers
asked by
Chika
997 views
A forklift raises a crate in 5.0 s, giving the crate 5000 J of potential energy.
What is the power of the forklift? What is the
2 answers
asked by
damien
954 views
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during
1 answer
asked by
Dee
955 views
Two joules of energy are required to extend a spring by .25 m. What is the spring constant?
2 answers
asked by
Nicole
931 views
A pitcher throws a fast ball with a speed of 45m/s. The ball has a mass of 0.145kg. How much a) kinetic energy is given to the
7 answers
asked by
Rosie
952 views
Calculate the energy associated with the photon that would be released when an H electron falls fro the n=3 energy level to the
2 answers
asked by
devon
932 views
Here's the question I'm currently working on...
What initial kinetic energy must an α particle have if it is to approach a
4 answers
asked by
Marissa
895 views
When its engine of power 75.0 kW is generating full power, a small single-engine airplane with mass 700 kg gains altitude at a
1 answer
asked by
Jasijo
884 views
A projectile with a mass of 2.50 kg is shot horizontally from a height of 15.0 m above a flat surface. The projectile's initial
4 answers
asked by
Marcus
909 views
Instructions: Read the following paragraph carefully. Then use what you know about momentum, work, and energy to answer the
1 answer
asked by
Annet
880 views
A 20 N force acts on a 10 kg object parallel to the object's displacement. If the force acts for 32 m, what is the final kinetic
2 answers
asked by
Megan
862 views
A 4.9 g marble is fired vertically upward using a spring gun. The spring must be compressed 8.0 cm if the marble is to just
2 answers
asked by
Jake
881 views
Two 0.61 kg basketballs, each with a radius of 13 cm, are just touching. How much energy is required to change the separation
2 answers
asked by
chris neives
860 views
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Parent Categories (12)
Dynamics
Electromagnetism
Forces and Motion
Kinematics
Kinetics
Mathematics
Mechanics
Physics
Physics/Newtonian Mechanics
Physics/Science
Science
Thermodynamics