21. What is the mass of an object that produces a force of 900 N while accelerating at 12 m/s?? 22. What is the net force required to accelerate a 750 kg car at 5 m/s2?
23. A 20 kg object is being pushed with a force of 440 N. What is its acceleration?
24. Label the arrows of the free-body diagram of a person falling with a parachute with the
correct forces
Label Force
Label Force

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

A110-pound person pulls herself up 4.0 feet. this took her 2.5 seconds. how much power was developed? 0.13 hp 0.32 hp 2.0 hp 3.1 hp