An man pushes on a heavy boulder sitting on the edge of a cliff on Mount Olympia, but it does not move. Which of the following is true of the boulder? O The potential energy is 0 Power is positive Work is being done The kinetic energy is 0

A crate is placed at the upper end of the 2.0 m long ramp that is inclined at 20° to the horizontal and allowed to slide down the ramp starting from rest. The crate has a mass of 150 KG and the coefficient of kinetic friction between the crate and then incline is 0.25. Draw a diagram showing all the forces acting on the crate. How much work is done by the gravity on the crate during the slide? How much work is done by friction during the slide? Use the work energy theorem to calculate the speed attained at the bottom of the ramp.Also,Which force does no work during the slide, and why?

A cyclist is riding a bike at 6.50 m/s on a horizontal track. The cyclist and their bike have a combined mass of 98 kg. How much work will be required for the cyclist to increase their speed to 10.0 m/s? Give your answer to the nearest Joule. Do not include units in your answer.

A worker pushing a 35.0-kg wooden crate at a constant speed for 13.6 m along a wood floor does 400 J of work by applying a constant horizontal force of magnitude F0 on the crate. (a) Determine the value of F0. ____N (b) If the worker now applies a force greater than F0, describe the subsequent motion of the crate. (c) Describe what would happen to the crate if the applied force is less than F0.

A 10 kg barbell is rolling down a hill. There is no friction or air resistance acting on it, only the force of gravity. If it starts out moving 2 ms1, and ends up moving 7 ms1, then how much work does gravity do on it?

An object with a mass of 3 kg is initially at rest on a horizontal floor. It is then pushed in a straight line for 3.00 m by a trained dog that exerts a horizontal force with a magnitude of 50N. Use the work-energy theorem to find the final speed of the object if there is no friction between the object and the floor. 7.75 m/s 10 m/s O 100 m/s O 12.25 m/s O 7.1 m/s

A skier is pulled by a towrope up a frictionless ski slope that makes an angle of 12 with the horizontal. The rope moves parallel to the slope with a constant speed of 1.0 m/s. The force of the rope does 900 J of work on the skier as the skier moves a distance of 8.0 m up the incline. (a) If the rope moved with a constant speed of 2.0 m/s, how much work would the force of the rope do on the skier as the skier moved a distance of 8.0 m up the incline? At what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 1.0 m/s and (c) 2.0 m/s?

In the figure, a constant force F a of magnitude 84.0 N is applied to a 3.0 kg shoe box at angle = 57.0°, causing the box to move up a frictionless ramp at constant speed. How much work is done on the box by F awhen the box has moved through vertical distance h = 0.35 m? Number i Units

Starting from rest at t = 0, a 5.0-kg block is pulled across a horizontal surface by a constant horizontal force having a magnitude of 12 N. If the coefficient of friction between the block and the surface is 0.20, at what rate is the 12-N force doing work at t = 5.0 s? 26 kW 0.12 kW 0.14 kW 12 kW 0.13 kW

M PAMP7 ** F20 A student pulls a crate of mass M up the inclined surface the distance d. The surface rises 0 degrees above the horizontal, as shown in the figure How much work does gravity do on the crate? Please use the following values: M = 11.9 kg, 0 = 26.9°, d = 5.88 m, g 9.80 m/s (PAMP716F20) a) 0612 J b) О310J c) O-612 J d) 0 686 J e) O-310 J