A 700 kgkg elevator accelerates upward at 1.4 m/s2m/s2 for 14 mm, starting from rest. A. How much work does gravity do on the elevator? Express your answer with the appropriate units. B. How much work does the tension in the elevator cable do on the elevator? Express your answer with the appropriate units. C.What is the elevator's kinetic energy after traveling 14 mm? Express your answer with the appropriate units.

In the attached image, the mass is 3.20 kg, and theta=37 degrees. The surface does have friction, with static coefficient=0.45 and kinetic coefficient=0.39.If a person takes hold of the rope and, pulling at this angle with a force of T=23 N, drags the box 3.8 meters... a. How much work is done on the box by person pulling? b. How much work is done on the box by the force of friction? c. What is the net work done on the box?

Q3 Block Attached to a Spring = An ideal spring with spring constant k 30 N/m is on a horizontal table and is stretched di 0.2 m from its natural length. A block of mass m = 100 g is attached to the spring. The block is released from rest, slides along the surface to the left and stops when the spring is compressed d2 = 0.06 m from its natural length. a. b. Natural Length d₂ d₁ X Find the work done by the force of friction. Find the coefficient of friction. =

A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 5.0 m/s for 8.0 m. Use g = 10 m/s2. Consider the system is the box and the Earth. Match the answers with questions.