3 Dynamics

Question 1

Momentum

Answer 1

Momentum is defined as the product of a body’s mass and its linear velocity

Question 2

Impulse

Answer 2

Impulse is defined as the product of the net force and the time interval which the force is applied

Question 3

Newton’s first law

Answer 3

A body will stay at rest or continue to move at a constant velocity unless acted upon by a resultant external force

Question 4

Newton’s second law

Answer 4

The rate of change of momentum of a body
is directly proportional to the resultant force acting on the body
and the momentum change takes place in the direction of the resultant force

Question 5

Newton’s third law

Answer 5

When two bodies interact, the force acting on one body is equal in magnitude and opposite in direction to the force acting on the other body

Question 6

Principle of conservation of linear momentum

Answer 6

The total momentum of a system remains constant provided no net external force acts on it