College Physics
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ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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I asked you yesterday this questions and you solved it like this!!!! Where did you get the distance from???? You used 10 for distance…. I did not give you a distance in the question???
A 5 kg block is moved up a 30 degree incline by a force of 50 N, parallel to the incline. The coefficient of kinetic friction between the block and the incline is 0.25. What is the net work done on the block over this distance?
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- a rope applies a hortizontal force of 180 N to pull a crate a distance of 2 m across a floor. A frictional force of 120 N opposes this motion. What is the total work done on the crate?arrow_forwardA man picks up a 50 kilogram block and carries it up a flight of stairs 10 meters high. He then carries the block back down the stairs and places the block in its original position. What is the NET work done on the block?arrow_forwardA spring has a natural length of 2 ft. A force of 20 lb stretches the spring to a length of 3 ft. Find the spring constant. Then calculate the amount of work done in stretching the spring from its natural length to 3 ft. How much work is done in stretching the spring from 4 ft to 5 ft. How far beyond the natural length will a 30 lb force stretch the spring?arrow_forward
- The figure below depicts a roller coaster track. The roller coaster car has a mass of 166 kg, and the heights of the two hills are h1 = 33.4 m and h2 = 13.1 m. At point A, the roller coaster car has a speed of 9.52 m/s. What is the car's kinetic energy (in Joules) at point C? Friction and air resistance can be neglected.arrow_forwardQ14. A 2 kg mass is projected down a rough circular track (R = 2m) as shown. The speed of the mass at point A is 4 m/s, and at point B, it is 6 m/s. How much work is done on the mass between A and B by the force of friction?arrow_forwardA person is 170 cm tall. He holds a 10 kg object on his head for 10 minutes. How much work is done on the object?arrow_forward
- A weight lifter raises a 80 kg barbell to a height of 2.4 m. what is the barbell's potential energy? Calculate answer to one decimal.arrow_forwardA box with a mass of 7.0kg is lifted very slowly (with essentially zero acceleration), though a height of 1.5m, in order to place it upon the shelf of a closet. What is the increase in potential energy of the box? How much work was required to lift the box to this position?arrow_forwardYou serve a volley ball with a mass of 2.1kg. The ball leaves your hand at 30m/s. The ball has energy. Calculate it. There is a bell at the top of a tower that is 45m high. The bell weighs 190N. The bell has energy. Calculate it. The potential energy of an apple is 6.0 joules. The apple is 3m high. What is the mass of the apple?arrow_forward
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