1. Force And Momentum

Question 1

Impulse of a force

Answer 1

The average resultant force x the time for which it acts

Equal to the change of momentum of the object

Question 2

The area under a force/time graph represents..

Answer 2

Change in momentum (the impulse of the force)

Question 3

The Principle of Momentum

Answer 3

For a system of interacting objects, the total momentum remains constant, provided no external resultant forces act on the system.

Question 4

Elastic Collisions

Answer 4

Collisions where there is no loss of kinetic energy

Question 5

Totally Inelastic Collisions

Answer 5

A collision where the colliding objects stick together

Question 6

Partially Inelastic Collision

Answer 6

A collision where colliding objects move apart and have less kinetic energy after the collision than before

Question 7

Momentum

Answer 7

The product of an object’s mass and velocity (kgms^-1 or Ns)

Question 8

Newton’s First Law of Motion

Answer 8

An object remains at rest or in uniform motion unless acted on by a force

Question 9

Newton’s Second Law of Motion

Answer 9

The rate of change of momentum of an object is proportional to the resultant force on it