Circular Motion Concepts

What is the effect of increasing speed on centripetal force, assuming radius remains constant?

• Centripetal force decreases as speed increases.

• Centripetal force remains constant regardless of speed.

• Centripetal force increases as speed increases.

• Centripetal force is independent of speed.

How does the concept of angular displacement relate to angular velocity?

• Angular displacement is the total angle rotated, while angular velocity is the rate of change of angular displacement.

• Angular displacement and angular velocity are the same concepts.

• Angular displacement measures linear distance, while angular velocity measures rotational speed.

• Angular displacement is irrelevant to angular velocity.

What happens to the centripetal force if the mass of an object in circular motion is doubled while keeping speed constant?

• Centripetal force remains unchanged.

• Centripetal force doubles.

• Centripetal force decreases.

• Centripetal force is halved.

Tags

NGSS.HS-PS2-1

An object moves round a circular path with an angular velocity of 20 rad/s. if the radius of the path is 2m, calculate the tangential speed of the object

• 40 m/s

• 10 m/s

• 0.1 m/s

• 18 m/s

Martins whirls a stone of mass 50kg, in a circular path, with the aid of a rope of length 10m, tired to it. if the linear speed is 4 m/s, calculate the centripetal force.

• 20 N

• 2000 N

• 250 N

• 80 N

Tags

NGSS.HS-PS2-1

Describe the effect of increasing the radius on centripetal force, assuming speed is constant.

• Increasing the radius has no effect on centripetal force at constant speed.

• Increasing the radius decreases the centripetal force if speed is constant.

• Increasing the radius increases the centripetal force if speed is constant.

• Centripetal force is independent of radius when speed is constant.

What is the difference between linear speed and angular speed?

• Linear speed measures speed in a circular path, while angular speed measures straight-line speed.

• Angular speed is distance per time; linear speed is angle per time.

• Linear speed is distance per time; angular speed is angle per time.

• Linear speed is the same as angular speed.

How does gravitational force act as a centripetal force in planetary motion?

• Gravitational force provides the necessary centripetal acceleration for planets to maintain their orbits around the sun.

• Planets move in straight lines due to gravitational force.

• Centripetal force is only caused by magnetic fields in space.

• Gravitational force repels planets away from the sun.

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

What are the units of measurement for centripetal force?

• Newtons (N)

• Kilograms (kg)

• Joules (J)

• Pascals (Pa)

Tags

NGSS.HS-PS2-1

A body takes 0.5 seconds to complete an oscillation. Calculate its angular velocity.

• 3.14 rad/s

• 314 rad/s

• 12.56 rad/s

• 1.256 rad/s