How high must the body be lifted to gain an amount of potential energy equal to the kinetic energy it has when moving at a speed of 20m/s? g=9.8m/s2

Friction is a force that opposes motion and can affect the conservation of momentum in a collision. When two objects collide, friction between them can cause a loss of momentum, resulting in a decrease in the final velocities of the objects.  Collisions are perpendicular interactions, while friction is a parallel force.  A collision happens when two bodies come in direct contact with each other. In this case, the two bodies exert forces on each other in a short period of time. The energy and momentum of bodies interacting undergo a change as a result of the collision.  The friction force... Show more

Friction is a force that opposes motion and can affect the conservation of momentum in a collision. When two objects collide, friction between them can cause a loss of momentum, resulting in a decrease in the final velocities of the objects. 
Collisions are perpendicular interactions, while friction is a parallel force. 
A collision happens when two bodies come in direct contact with each other. In this case, the two bodies exert forces on each other in a short period of time. The energy and momentum of bodies interacting undergo a change as a result of the collision. 

The friction force between the two bodies will change the motion of the object and the momentum after the collision changes but will be constant before and after the collision.
 

Related Test: Engineering Physics Practice Test: Friction & Motion

Show less