Why are frames of reference important for motion

Two boys are standing on a bridge 10 m above a stream. One boy throws a rock horizontally with speed of 5.0 m/s at exactly the same time that the other boy drops a rock vertically.

What is the momentum of a volleyball with a velocity of 50 mph and a mass of. 5 kg?

A bowling ball has a mass of 6 kg what happens to its momentum when its speed increases from 2 m/s to 4 m/s

The momentum of an object depends on what two factors?

Solar energy is a form of energy from the Sun. OA) heat OB) nuclear OC) mechanical OD) electromagnetic

Consider the following controls in an automobile in motion : gas pedal, brake, steering wheel. what are the controls in this list that cause an acceleration of the car?

What material are oil pipelines made from?

3/129 A 175-lb pole vaulter carrying a uniform 16-ft, 10-lb pole approaches the jump with a velocity v and manages to barely clear the bar set at a height of 18 ft. As he clears the bar, his velocity and that of the pole are essentially zero.

A few years ago, Serena Williams dived to hit a tennis ball right after it bounced off the ground. The ball bounced on the ground 10.3 m from the net, and after Serena hit the ball it flew over the 0.

A force of 1.25x103N is required to lift an object that is under the influence of an acceleration due to gravity of 7.86ft/sec2. What is the object's mass in kilograms?