Unit 3: Review

Front

What is the centripetal acceleration formula?

Back

Centripetal acceleration (a_c) = v^2 / r, where v is the velocity and r is the radius of the circular path.

Front

Which of the following is an example of balancing forces?

Back

A Book resting on the table.

Front

What type of friction is not moving?

Back

Static friction.

Front

How does friction affect speed?

Back

More friction decreases speed.

Front

What is the velocity formula for uniform circular motion?

Back

Velocity (v) = 2πr / T, where r is the radius and T is the period.

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is the definition of net force?

Back

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

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is kinetic friction?

Back

Kinetic friction is the frictional force acting between moving surfaces.

Front

What is the principle of conservation of momentum?

Back

In a closed system, the total momentum before an event is equal to the total momentum after the event.