Homework #10

Front

Centripetal force is...

Back

the inward force acting on a body moving at constant speed in a circle.

Front

What are the units on the coefficient of friction?

Back

none.

Front

If a ball thrown straight up into the air takes 4 seconds to reach the top (peak), how long will it take to travel from the peak back to the original position?

Back

4 seconds.

Front

The time taken for one complete circuit is called the...

Back

Period.

Front

A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them. This demonstrates which of Newton's Laws?

Back

Newton's 1st Law.

Front

What is the formula for centripetal acceleration?

Back

a_c = v^2 / r, where v is the velocity and r is the radius.

Front

Define frequency in the context of circular motion.

Back

Frequency is the number of complete cycles or revolutions per unit time.

Front

What is the relationship between period and frequency?

Back

Period (T) is the reciprocal of frequency (f): T = 1/f.

Front

What is Newton's 2nd Law of Motion?

Back

F = ma, where F is the net force, m is mass, and a is acceleration.

Front

Explain the concept of inertia.

Back

Inertia is the tendency of an object to resist changes in its state of motion.