A person, of weight mg, is standing on a scale in an elevator. What will the scale read when the elevator accelerates upward?

A. More than mg
B. Less than mg
C. Equal to mg
D. Cannot tell what the scale will read.

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created or , but it can be

What is the momentum of a 2 kg object moving at 15 meters per second

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.