Circular Motion Concepts

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

Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration? Ac = v^2 / r

• 0.25 m/s²

• 0.5 m/s²

• 1 m/s²

• 2 m/s²

Tags

NGSS.HS-PS2-1

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

• up
• right
• down
• left

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

• outwards
• towards the center
• tangent
• faster

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

Tags

NGSS.MS-PS2-2

Centrifugal force is a ______

• force that pushes you to the outside of a circle during uniform circular motion.

• fictitious force that is really just the inertia of an object in circular motion.

• The force that keeps the planets in orbit

What's the centripetal acceleration of an object traveling 2.3 m/s around a circle of diameter 0.6 m?

• 5 m/s²

• 17.63 m/s²

• 10 m/s²

• 8.81 m/s²

Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s². V^2 = Ac*r

• 2.4 m/s

• 3.6 m/s

• 3.9 m/s

• 4.2 m/s

Tags

NGSS.HS-PS2-1

A 10 kg toy car is following a circular path with a constant speed of v=3 m/s . If the radius of the circular path is 1 m, find the centripetal force of the car. ...Ac=v^2 / r .......Fc=m(v^2)/r

• 30 N

• 3 N

• 9 N

• 90 N

Tags

NGSS.HS-PS2-1

Centripetal acceleration is ...

• Acceleration toward the center of a curved or circular path
• Acceleration toward the outside of a circle
• Vertical motion instead of horizontal motion