Circular Motion

Harry Potter waved his .23 kg wand with .069 N of force. With what acceleration did Harry rotate his wand?

• 0.4 m/s²

• 3.3 m/s²

• .3 m/s²

• 0.16 m/s²

Which represents the acceleration of the ball?

• A

• B

• C

• D

Which of the following depict the velocity of the ball?

• A

• B

• C

• D

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.

• 2.4 m/s
• 3.6 m/s
• 3.9 m/s
• 4.2 m/s

Tags

NGSS.HS-PS2-1

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

• 4.1 kg

• 10 kg

• 2.5 kg

• 5 kg

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

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

• up
• right
• down
• left

If the radius of the string is .3 meters long and the stopper makes 5 revolutions in 1 second, what is the speed of the stopper?

• 9.4 m/s

• 6.8 m/s

• 11.7 m/s

• 3.5 m/s

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

Tags

NGSS.HS-PS2-1

A bicycle has a period of 0.3s . What is the

speed of its tires if their radius is 0.3 m?

• 6.2 m/s

• 3 m/s

• 62 m/s

• 30 m/s