O_TEXTBLOCK_TEXT Each moving crate has momentum. The heaviest crate has the most momentum and is able to overcome <HL Topic=Force.tpc>FORCES</HL> such as the pull of <HL Topic=Gravity.tpc>GRAVITY</HL> and surface <HL Topic=Friction.tpc>FRICTION</HL> longer than the other two crates. If any of the crates were to run into another object some of its momentum would be transferred, but none of it would be lost.
E_QUEST1 When playing pool, what happens when the cue ball hits another ball?
E_QUEST2 When a train climbs a steep hill, what happens to its momentum?
E_QUEST3 What happens to the momentum of a bowling ball when it hits the pins?
D_TEXTBLOCK_TEXT When objects are in <HL Topic=Motion.tpc>MOTION</HL>, they have momentum; the amount of an object's momentum depends on an object's <HL Topic=Mass.tpc>MASS</HL> and velocity. When something in <HL Topic=Motion.tpc>MOTION</HL> bumps into another object, some momentum is transferred if the collision is elastic. The total amount of momentum stays the same and is said to be conserved.