Dynamics

Question 1

What does Newton’s first law state?

Answer 1

When the resultant force is 0 N, a body will remain stationary or continue moving with a constant velocity.

Question 2

What does Newton’s third law state?

Answer 2

If body A exerts a force on body B, then body B exerts an equal and opposite force on body A.

Question 3

How is momentum defined and what is its equation?

Answer 3

Momentum (p) is equal to an object’s mass (m) multiplied by its velocity (v), measured in kg·m/s. Equation: p = mv

Question 4

What is the principle of conservation of momentum?

Answer 4

The sum of the momenta of bodies in a system remains constant, even if forces act between them, provided there is no external resultant force.

Question 5

What is an inelastic collision?

Answer 5

An inelastic collision is one in which kinetic energy is lost.

Question 6

What characterizes an elastic collision?

Answer 6

In an elastic collision, the kinetic energy before and after the collision remains equal.