Physics Fall Semester Test Review Part 3/3

Front

What is Newton's 1st Law of Motion?

Back

An object at rest will stay at rest and an object in motion will stay in motion unless acted on by a net external force.

Front

What is the formula for calculating the coefficient of friction (μ)?

Back

μ = F_f / F_N, where F_f is the force of friction and F_N is the normal force.

Front

If F_N = 100N and F_f = 20N, what is the coefficient of friction (μ)?

Back

μ = 0.2.

Front

What is net force?

Back

The net force is the vector sum of all the forces acting on an object.

Front

How do you determine the direction of net force?

Back

The direction of net force is the direction of the greater force acting on the object.

Front

What is Newton's 3rd Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

If a baseball player hits a ball with 400 N of force, how much force does the ball exert on the bat?

Back

The ball exerts 400 N of force on the bat.

Front

Why can't you tell that the Earth has moved when you jump?

Back

The Earth has much more mass than you, so its movement is imperceptible.

Front

What is the relationship between mass and inertia?

Back

Inertia is the resistance of an object to change its state of motion, and it is directly proportional to the mass of the object.

Front

What is the formula for calculating force?

Back

F = m * a, where F is force, m is mass, and a is acceleration.