Circular Motion Quiz

What is the definition of uniform circular motion?

• Motion in a straight line at constant speed

• Motion in a circular path at varying speed

• Motion in a circular path at constant speed

• Motion that does not involve any acceleration

A stone is tied to a string and swung in a horizontal circle. If the string breaks, what will happen to the stone?

• It will continue to move in a circular path.

• It will move in a straight line tangent to the circle.

• It will fall straight down.

• It will come to a stop immediately.

Which of the following statements best describes centripetal acceleration?

• It is directed away from the center of the circular path.

• It is the acceleration that keeps an object moving in a straight line.

• It is the acceleration directed towards the center of the circular path.

• It is the acceleration that increases the speed of the object.

If a planet orbits a star in a circular path, what happens to the gravitational force if the distance between the planet and the star is halved?

• It remains the same.

• It doubles.

• It quadruples.

• It decreases by half.

A satellite is in a circular orbit around the Earth. Which of the following forces provides the necessary centripetal force for the satellite's motion?

• Gravitational force

• Frictional force

• Tension force

• Normal force

If the mass of an object is doubled while maintaining the same speed in circular motion, what happens to the centripetal force required to keep it in circular motion?

• It remains the same.

• It doubles.

• It quadruples.

• It halves.

A car is moving in a circular track with a radius of 50 m at a speed of 20 m/s. What is the centripetal acceleration of the car?

• 4 m/s²

• 8 m/s²

• 10 m/s²

• 16 m/s²

Evaluate the effect of increasing the radius of a circular path on the tangential speed if the angular velocity remains constant.

• The tangential speed decreases.

• The tangential speed remains the same.

• The tangential speed increases.

• The tangential speed becomes zero.

Design an experiment to measure the effect of mass on centripetal force in circular motion. What would be the key variables to control?

• Speed and radius of the circular path

• Only the mass of the object

• Only the radius of the circular path

• The type of surface the object moves on