Uniform Circular Motion

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

• 3.6 kg

• 2.5 kg

• 1.8 kg

Tags

NGSS.HS-PS2-1

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

• direct

• inverse

• exponential

• inverse squared

Which of the following is the unit for centripetal force?

• J

• m/s²

• kg⋅m/s

• N

Which of the following ranks the tensions in the strings from highest to lowest?

• A>C>D>B

• B>D>C>A

• B>C>A>D

• D>A>C>B

Tags

NGSS.HS-PS2-1

A stone is tied to a string and whirled in a vertical circle at a radius. Which of the following cannot be true?

• The string is most likely to break at the bottom of the circle.

• The tension force is the same everywhere in the circle

• The tension is the least when the stone is at the top of the circle.

Tags

NGSS.HS-PS2-1

A ball with a mass m is fastened to a string and is swung in a vertical circle. When the ball is at the highest point of the circle the tension in the string is:

• mg

• mg + ma

• ma -mg

• mg/ma

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

When a student stands on a rotating table, the frictional force exerted on the student by the table is

• greater in magnitude than the frictional force exerted on the table by the student

• less in magnitude than the frictional force exerted on the table by the student

• equal in magnitude than the frictional force exerted on the table by the student

• directed away from the center of the table

Tags

NGSS.HS-PS2-1

The time taken for one complete cycle is called the...

• Period

• Frequency

• Angular velocity

Tags

NGSS.HS-PS4-1

Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?

• 0.25 ms^-2

• 0.5 ms^-2

• 1 ms^-2

• 2 ms^-2

Tags

NGSS.HS-PS2-1

What's the centripetal acceleration of an object traveling 2 m/s around a circle of diameter 1 m?

• 4 m/s²

• 8 m/s²

• 10 m/s²

• 16 m/s²