AP Physics Circular Motion

A car moves in a horizontal circle with a radius of 10 m. The tangential velocity of the car is 30 m/s. What is the car's acceleration?

• 3 m/s² toward the center

• 3 m/s² away from the center

• 90 m/s² toward the center

• 90 m/s² away from the center

• 270 m/s² toward the center

Tags

NGSS.HS-PS2-1

The centripetal acceleration on a 1000-kg car in a turn is 1 x 10⁵ m/s². The radius of the turn in 10 m. What is the car's speed?

• 10 m/s

• 100 m/s

• 1000 m/s

• 10000 m/s

• 100,000 m/s

Tags

NGSS.HS-PS2-1

Engineers have designed a centrifuge for studying the effects of high gravity environments on plants and animals. This graph shows the results of the relationship between the radius and the centripetal acceleration, If the scientists want to simulate a "3-g" environment, then what should the radius of the centrifuge be?

• 1 m

• 2 m

• 3 m

• 5 m

• 10 m

Based on the graph, if an astronaut with a mass of 70 kg were placed in that centrifuge with a radius of 5 m, what would be the centripetal force acting on him?

• 30 N

• 70 N

• 140 N

• 210 N

• 240 N

Tags

NGSS.HS-PS2-1

A tetherball swings in a horizontal circle. If the radius of swing is tripled but the tangential speed remains the same, by which factor does the centripetal force change?

• 9X greater

• 3X greater

• remains the same

• 3X smaller (one-third as much)

• 9X smaller (one-ninth as much)

Tags

NGSS.HS-PS2-1