Circular Motion

Front

What is the force that acts on a satellite circling the Earth?

Back

Centripetal force.

Front

In circular motion, what does the velocity of an object represent?

Back

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

Front

What is the direction of acceleration for an object in circular motion?

Back

The direction of acceleration is towards the center of the circle.

Front

What is the direction of velocity at point A if the ball is revolving clockwise?

Back

Right.

Front

What is the direction of acceleration at point A if the ball is revolving clockwise?

Back

Down.

Front

What is the definition of centripetal force?

Back

Centripetal force is the force that keeps an object moving in a circular path, directed towards the center of the circle.

Front

What is the difference between centripetal force and centrifugal force?

Back

Centripetal force is an actual force acting towards the center of the circle, while centrifugal force is a perceived force that appears to act outward on a mass moving in a circular path.

Front

What is the formula for centripetal acceleration?

Back

Centripetal acceleration (a_c) = v²/r, where v is the linear speed and r is the radius of the circular path.

Front

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

Back

If the speed increases, the centripetal force must also increase to maintain circular motion.

Front

What is the relationship between radius and centripetal force?

Back

For a constant speed, as the radius increases, the centripetal force decreases.