A box of mass 12955 kg is pulled from rest up a 15.5 m long incline that makes an angle of 25.0° with the horizontal. At the top of the incline, the speed of the box is 3.35 m/s. What is the work done by the pulling force? (neglect friction.).

A spring has a natural length of 40 cm (or 0.40m). If a 60-N force is required to keep the spring compress to 10 cm, (a) how much work is done during the compression? (b) how much work is needed to compress the spring to a length of 25 cm?

A crane lifts a 650 kg beam vertically upward 6.6 m and then swings it westward 18 m. How much work does the crane do? Neglect any friction and assume the crane moves with constant speed Answer: Choose...

K Solve for the indicated variable. Assume all variables are positive. QV₁ QV₂ T. L T₂ ; for T₁ (Simplify your answer.)

A block of mass m=1.5kg is released from rest at an unknown height h. The coefficient of friction between the block and the incline oriented at an angle of 0=56° is Hk=0.21. If the speed of the block v=4.1m/s when it leaves the inclined plane, determine the work done by the force of gravity. Take g =9.81m/s? and express your final result using one decimal place. m m

If the hand does 40 J of work on the 2.5 kg cart, how fast will it travel?  If the person does 480 J of work on the 32kg box to move it at a speed of 4 m/s, how much energy is dissipated due friction? If the spring is compressed 12 cm and has a constant of 860 N/m, how high will the 1.3 kg chicken go?Use the values given in the problem. How much work does the weightlifter do?Use the values given in the problem. How much work does the cable do?

answer should be fraction

A crane pulls a 700 kg box at a constant velocity straight up for a distance of 50 m. Calculate the work done by the crane.

A 97.5-kg man pushes a crate 4.5 m up along a ramp that makes an angle of 17.5° with the horizontal. He exerts a force of 495 N on the crate parallel to the ramp and moves it at a constant speed. Calculate the work, in joules, that the man performs to cause the crate and himself to move up the ramp.

Calculate the work done (in J) by a 75.0 kg man who pushes a crate 4.30 m up along a ramp that makes an angle of 20.0° with the horizontal. (See the figure below.) He exerts a force of 540 N on the crate parallel to the ramp and moves at a constant speed. Be certain to include the work he does on the crate and on his body to get up the ramp.