AP Physics Unit 2

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

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

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

Three forces act on an object.  If the object is in translational equilibrium, which of the following must be true:

• i only

• ii only

• i & iii only

• i, ii, & iii only

Tags

NGSS.HS-PS2-1

An open cart on a level surface is rolling without frictional loss through a verticle downpour of rain, as shown in the figure. As the cart rolls, an appreciable amount of the rainwater accumulates in the cart. The speed of the cart will

• increase because of conservation of mechanical energy

• decrease because of conservation of momentum

• decrease because of conservation of mechanical energy

• remain the same because the raindrops are falling perpendicular to the direction of the cart's motion

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

When there is a steady current in the circuit, the amount of charge passing a point per unit of time is

• Greater in the 2 Ω resistor than the 3  Ω resistor

• greater at point X than at Y

• greater in the 1 Ω resistor than the 2 Ω resistor

• Greater in the 1 Ω resistor than the 3  Ω resistor