An elephant kicks a 2.5 kg rock that is initially at rest. The net force on the rock varies with time as shown below.
What is the rock's change in momentum between 0 ms
and 20 ms?

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

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

Which sound characteristic is not affected by the relative motion of an object