Circular Motion & Gravitation

Which of the following vectors depicts the tangential speed of the blowing ball?

• A
• B
• C
• D

A horse gallops around a circular arena.  The centripetal force on the horse is ___.

• directed outward
• tension
• directed toward the center of the arena
• 9.8 N

What relationship exists between the radius of a circle and the centripetal acceleration?

• direct
• inverse
• exponential
• inverse squared

Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a velocity of 3 m/s if the ball weighs 0.12 kg and her arm is 0.65 meters long.

• .38
• 1.23
• .55
• 1.66 N

Tags

NGSS.HS-PS2-1

A car traveling at 15 m/s on a flat surface turns in a circle with a radius of 25 m.  What is the centripetal acceleration of the car?

• 2.4 x 10^-2 m/s²
• 0.60 m/s²
• 9.0 m/s²
• zero

Tags

NGSS.HS-PS2-1

Which of the following terms means "center seeking"?

• centrifugal
• centrifuge
• centripetal
• centenarian

What is the relationship between centripetal force and the mass of an object?

• direct
• inverse
• exponential
• inverse squared

Tags

NGSS.HS-PS2-1

In a ride that causes you to stick to the wall, what acts as the CENTRIPETAL FORCE ?

• Friction
• Gravity
• Normal
• momentum

Tags

NGSS.HS-PS2-1

What are the forces that causes centripetal acceleration when a car goes around a banked curve?

• Friction & Normal
• Gravity & Friction
• Normal & Gravity
• Tension & Gravity

You are moving a ball in a circle using 72 N of centripetal force. What would the force be if you doubled the radius of the circle but did not change the speed?

• 18 N
• 36 N 
• 72 N
• 144 N