Centripetal Motion

Centripetal Force

E.Q. What forces act on objects that are spinning?

H.P.2B.8 Develop and use models (such as a computer simulation, drawing, or demonstration) and Newton’s Second Law of Motion to construct explanations for why an object moving at a constant speed in a circle is accelerating.

Multiple Choice

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

Multiple Choice

Which of the following depict the speed of the blowing ball?

• A
• B
• C
• D

Multiple Choice

Which represents the acceleration of the ball?

• A
• B
• C
• D

Open Ended

What's your good thing for today, how are you feeling (1-10) or Would you rather read an awesome book or watch a good movie?

Multiple Choice

What force is needed to make an object move in a

circle?

• kinetic friction

• static friction

• centripetal force

• weight

Multiple Choice

When an object experiences uniform circular

motion, the direction of the net force is

• in the same direction as the motion of the object

• in the opposite direction of the motion of the object

• is directed toward the center of the circular path

• is directed away from the center of the

  circular path

Multiple Choice

A car with a mass of 1800 kg goes around an 18

m radius turn at a speed of 35 m/s. What is the

centripetal force on the car?

• 25,000 N

• 75,000 N

• 122,500 N

• 250,000 N

Multiple Choice

A ball on a string spins in a horizontal circle of

radius 2.5 m with a speed of 3.0 m/s. The tension in

the string is 5.4 N. What is the mass of the ball?

• 1.5 kg

• 3.0 kg

• 3.6 kg

• 4.8 kg

Multiple Choice

A 75 kg mass is attached to the end of a 5.0 m

long metal rod string which rotates in a horizontal

circular path. If the maximum force that the rod can

withstand is 8500 N. What is the maximum speed

that the mass can attain without breaking the rod?

• 15 m/s

• 24 m/s

• 25 m/s

• 110 m/s

Multiple Choice

What is the net force on a 2.0 kg mass spinning in a

circle with radius 1.5 m with a frequency of 4.0 Hz?

• 3.0 N

• 19 N

• 380 N

• 1900 N