Circular Motion Practice

Front

The velocity is always _____ to the line of a circle.

Back

tangent

Front

What is the formula for centripetal force?

Back

F_c = (m * v^2) / r, where F_c is centripetal force, m is mass, v is tangential velocity, and r is radius.

Front

What is centripetal acceleration?

Back

Centripetal acceleration is the acceleration directed towards the center of a circular path, calculated as a_c = v^2 / r.

Front

What is the relationship between tangential speed and radius in circular motion?

Back

Tangential speed (v) is directly proportional to the radius (r) and the angular velocity (ω): v = r * ω.

Front

Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.

Back

40 N

Front

A pebble that is 4.25 m from the eye of a tornado has a tangential speed of 150 m/s. What is the magnitude of the pebble’s centripetal acceleration?

Back

5924 m/s²

Front

What is the formula for centripetal acceleration?

Back

a_c = v^2 / r, where a_c is centripetal acceleration, v is tangential velocity, and r is radius.

Front

What is the definition of centripetal force?

Back

Centripetal force is the net force acting on an object moving in a circular path, directed towards the center of the circle.

Front

If a girl swinging on a tire has a centripetal acceleration of 3.0 m/s² and the length of the rope is 2.1 m, what is her tangential speed?

Back

2.5 m/s

Front

What happens to centripetal force if the mass of the object increases?

Back

Centripetal force increases as mass increases, assuming velocity and radius remain constant.