Gr12 Impulse and momentum

Question 1

Define momentum

Answer 1

It is the product of an object’s mass and its velocity.

Question 2

Describe the linear momentum

Answer 2

It is a vector quantity with the same direction
as the velocity of the object.

Question 3

State Newton’s second law of motion in terms of momentum

Answer 3

The resultant (or net) force acting on an object is equal to the rate of change of momentum of the object in the direction of the resultant (or net) force.

Question 4

Define impulse

Answer 4

It is the product of the resultant/net force acting on an object and the
time the resultant (or net) force acts on the object.

Question 5

Explain what is meant by a closed system (in Physics)

Answer 5

It is a system on which the resultant (or net) external force is zero.

Question 6

State the principle of conservation of linear momentum

Answer 6

The total linear momentum of a closed system remains constant (is conserved).