Dynamics

Question 1

Define mass

Answer 1

The mass of a body is a measure of its resistance to change in state of motion

Question 2

Define momentum

Answer 2

The momentum of a body is defined as the product of its mass and velocity
p = mv

Question 3

Define force

Answer 3

The force exerted by X on Y is defined as the rate of change of momentum of Y produced by X
F = dp/dt

Question 4

Define impulse

Answer 4

The impulse of a force is defined as the product of the force and the time of impact of the force.
J = Ft

Question 5

What is Newton’s First Law of Motion?

Answer 5

In the absence of resultant external force acting on the it, a body at rest will remain at rest and a body in motion will continue its motion at constant velocity.

Question 6

What is Newton’s Second Law of Motion?

Answer 6

The rate of change in the momentum of a body is proportional to the resultant external force that acts on it, and the change in momentum is in the direction of the force.
Total F = dp/dt

Question 7

What is Newton’s Third Law of Motion?

Answer 7

When body A exerts a action force on body B, body B exert a reaction force on body A that is equal in magnitude and opposite in direction to the action force.

Question 8

What is the principle of conservation of linear momentum?

Answer 8

The principle of conservation of linear momentum states that in the absence of external forces, the total momentum of bodies in a system remains constant.