AP Physics Unit 3

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

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

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

A block of mass 3.0 Kg is suspended from a string, causing it to stretch 12cm before reaching equilibrium, as shown in the image.
The 3.0 Kg block is replaced with a 4.0 Kg block and it is released from the position shown above, at which the spring is unstretched.
How far will the 4.0 Kg block fall before the direction is reversed?

• 9 cm

• 18 cm

• 24 cm

• 32 cm

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A ball of mass 0.4 Kg is initially at rest on the ground.  It is kicked and leaves the kicker's foot at a 60 degree angle above the horizontal at 5 m/s.  The magnitude of the impulse imparted by the foot to the ball is

• 1  1 N * s 

• 2  2 N * s 

• 3  3 N * s

• 4  4 N * s 

Tags

NGSS.HS-PS2-1

A rock of mass m is thrown horizontally off the top of a cliff of height h, as shown in the diagram.  The speed of the rock as it leaves the throwers hand is v.
How much time does it take for the rock to hit the ground?

• √hv

• h/√gv

• √(h/mg)

• √(2h/g)