AP Physics

What happens to an object's speed as the radius decreases?

• It increases.

• It decreases.

• It remains unchanged.

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

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

• Period

• Frequency

• Angular velocity

Tags

NGSS.HS-PS4-1

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

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

What happens to the acceleration of an Atwood machine as the difference between the two masses increases?

• increases

• decreases

• does not change

Tags

NGSS.HS-PS2-1

If you were trying to quickly determine the static coefficient of friction, you'd raise the plank until the block just starts to slide and do what?

• tan theta = mu

• cos theta = mu

• sin theta = mu

• none of these is correct

Tags

NGSS.HS-PS2-1

Calculate the normal force for this situation if the angle is 30 degrees and the mass of the box is 1.5 kg.

• .75 N

• 7.5 N

• 13.0 N

• none of these is correct

Tags

NGSS.HS-PS2-1