Circular Motion

Bruno the bat has a mass of 0.58 kg and flies at a speed of 0.8 m/s in circle of radius 0.5 m. What is his acceleration?

• 0.25 m/s²

• 1.3 m/s²

• 1.6 m/s²

• 0.74 m/s²

Tags

NGSS.HS-PS2-1

A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?

• A
• B
• C
• D

The linear or tangential velocity is always _____

• parallel to the radius/acceleration.

• towards the center

• perpendicular to the radius/acceleration.

• away from the center

A race car completes three laps of a circular track with a radius of 35 m in 9.0 seconds. Determine the speed of the car.

• 3.9 m/s

• 73.3 m/s

• 24.4 m/s

• 1.0 m/s

Centripetal acceleration always points

• in the direction of the object's motion
• in the opposite direction of the object's motion
• towards the center of the circle
• towards the outside of the circle

You swing a bucket of water attached to a string in a circle above your head. What keeps the water in the bucket?

• Friction

• Centripetal Force

• Gravity

• Inertia

What is the source of centripetal force for planets in space?

• Inertia

• Tension

• Gravity

• Acceleration

What is the source of centifugal force for planets in space?

• Inertia

• Tension

• Gravity

• Acceleration

A ball on a string is spun around in a circle. Which of the following quantities is not constant?

• mass

• force

• velocity

• acceleration

A 12 kg object undergoes circular motion with a radius of 4 m and a speed of 18 m/s. What is the centripetal acceleration of the object?

• 1.125 m/s²

• 81 m/s²

• 4.5 m/s²

• 36 m/s²

Tags

NGSS.HS-PS2-1