Momentum

Question 1

Define watt

Answer 1

Unit of energy transfer, 1 Watt is equal to one joule transferred per second

Question 2

Newton’s first law

Answer 2

An object will remain in its current state of motion, unless acted on by a resultant force. An object requires a resultant force to be able to accelerate

Question 3

Newton’s third law

Answer 3

Every action has an. Equal and opposite reaction. If an object excerpts a force on another object, then the other object must exert a force back, that is opposite in direction and equal in magnitude.

Question 4

Newton’s second law

Answer 4

The sum of the forces acting on an object is equal to the rate of change of momentum on another object.

Question 5

Define work done by a force

Answer 5

Work done is equal to energy transferred

Question 6

Impulse

Answer 6

The change of momentum when a force acts on it. It is equal to the product of the force acting on the object and length of time over which it acts. Impulse = force x time

Question 7

Conservation of momentum

Answer 7

The total momentum of a system before an event must be equal to the total momentum of the system after the event, assuming no external forces act.

Question 8

Elastic collisions

Answer 8

A collision in which the total kinetic energy of the system before the collision is equal to the total kinetic energy of the system after the collision.

Question 9

Inelastic collisions

Answer 9

A collisions in which the total kinetic energy of the system before the collision is not equal to the kinetic energy after the collision

Question 10

Linear Momentum

Answer 10

The product of an object’s mass and linear velocity.