Cfu

An object moving in a circle with constant velocity has ZERO acceleration.

• TRUE

• FALSE

WHICH STATEMENT IS TRUE?

• An object moving in a circle will continue in circular motion when released.

• An object in circular motion will fly out radially (curved) when released.

• An object moving in circular motion will fly out tangent (straight line) to the circular path when released.

What is the direction of the velocity at Point A, if the ball is revolving clockwise?

• Up

• Down

• Left

• Right

What direction is the centripetal force when the rollercoaster is at the top of the loop?

• Towards the sky

• Towards the Right

• Towards the left

• Towards the ground

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

Calculate the mass of an object if it took 20 N of force to rotate it in a circle with a radius of 2 meters at a velocity of 4 m/s.

• 4.1 kg
• 3.6 kg
• 2.5 kg
• 1.8 kg

Tags

NGSS.HS-PS2-1

If the radius of the string is 0.3 meters long and the stopper takes 0.2 seconds to make a complete circle, what is the velocity of the stopper?

• 9.4 m/s
• 6.8 m/s
• 11.7 m/s
• 3.5 m/s

A 750 kg car is going over the top of a hill with a curvature radius of 3 meters. What is the maximum velocity that the car can travel and still stay on the hill is it's only acceleration is due to gravity?

• 29.4 m/s

• 3.27 m/s

• 5.42 m/s

• 2.25 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4