A boat sails along the shore. to an observer, the boat appears to move at a speed of 3m/s, and a man on the boat walking foward appears to have a speed of 4.2 m/s how long does it take the man to move 8 m relative to the boat?

A 1400 kg vehicle travelling at 22 m/s slows at a constant rate to 4.5 m/s in 6.75 s. What was the net force acting on the car during this time?

Four ways to increase magnitude of current in dynamo

On Monday while Johnny was getting ready for school, he was in the bathroom holding his comb when he got an itch on his head. Johnny used the comb to rub his itch away and when he did his hair was a mess.

What happens when the data in an experiment does not support the hypothesis?

What is the single most important factor that determines why Earth (or almost any planet in the Solar System) experiences seasons?

Imagine that you replace the block in the video with a happy or sad ball identical to the one used as a pendulum, so that the sad ball strikes a sad ball and the happy ball strikes a happy ball.

Under what conditions will an object experience a gravitational force? Under what conditions will an object experience an electric force? Under what conditions will an object experience a magnetic force?

A basketball player pushes down with a force of 34 N on a basketball that is inflated to a gauge pressure of 9 x 104 Pa. What is the diameter of contact between the ball! and the floor?

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?