Centripetal force

Which represents the acceleration of the ball?

• A
• B
• C
• D

Tags

NGSS.HS-PS2-1

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

Tags

NGSS.HS-PS2-1

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 .12 kg and her arm is .65 meters long.

• .38
• 1.23
• .55
• 1.66 N

Tags

NGSS.HS-PS2-1

A car is rounding a bend as shown in the diagram. Which arrow correctly shows the direction of the cars velocity?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

In the diagram of the car, if the driver took his hands off the steering wheel, which arrow correctly shows the direction the car would travel in?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

Why should you reduce speed around a turn if the road is icy?

• Because your car will travel in a straight line unless forced to do otherwise

• Because the ice reduces the frictional force between the tires and the road.

• Because a minimum amount of centripetal force is required to keep your car moving around the curve.

• All of the above.

Tags

NGSS.HS-PS2-1

centripetal force arises from a combination of other forces acting on an object

• T

• F

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 .12 kg and her arm is .65 meters long.

• .38
• 1.23
• .55
• 1.66 N

Tags

NGSS.HS-PS2-1

A car with mass m travels around a curve with velocity v. What do you know about the centripetal force if the radius triples?

• 9.8?
• Force triples
• Force divides by 3
• Force divides by 9

Tags

NGSS.HS-PS2-1

Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.

• 10 N
• 20 N
• 30 N
• 40  N

Tags

NGSS.HS-PS2-1