Circular Motion & Gravitational Law Test

1.     The magnitude of the gravitational field on the surface of a particular planet is 2g. The planet’s mass is half the mass of the Earth. What is the planet’s radius in terms of the radius of Earth?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-4

Each of five satellites makes a circular orbit about an object that is much more massive than any of the satellites. The mass and orbital radius of each satellite are given below. Which satellite has the greatest force due to gravity?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-4

A satellite of mass m and speed v moves in a stable, circular orbit around a planet of mass M. What is the radius of the satellite’s orbit?

• A

• B

• C

• D

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

A ball attached to a string is whirled around in a horizontal circle having a radius R. If the radius of the circle is changed to 4R and the same centripetal force is applied by the string, the new speed of the ball is which of the following?

• (A) One-quarter the original speed

• (B) One-half the original speed

• (C) The same as the original speed

• (D) Twice the original speed

Tags

NGSS.HS-PS2-1

A student is spinning a cup full of water in a horizontal circle. Determine the acceleration of the cup in terms of the radius, period, and any relevant constants.

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

1.     An automobile moves at constant speed down one hill and up another hill along the smoothly curved surface shown. Which of the following diagrams best represents the directions of the velocity and the acceleration of the automobile at the instant that it is at the lowest position as shown above?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

For this question: Select two correct choices to earn credit ( No Partial Credit )

A person stands on a merry-go-round which is rotating at constant speed. Which of the following are true about the frictional force exerted on the person by the merry-go-round? Select two answers.

• (A)  The force is greater in magnitude than the frictional force exerted by the person on the merry-go-round.

• (B)  The force is opposite in direction to the frictional force exerted on the merry-go-round by the person.

• (C)  The force is directed away from the center of the merry-go-round.

• (D)  The force is dependent on the person's mass.

Tags

NGSS.HS-PS2-1

In which of the following situations would an object be accelerated? Select two answers.

• (A) It moves in a straight line at constant speed.

• (B) It moves with uniform circular motion.

• (C) It travels as a projectile in a gravitational field with negligible air resistance.

• (D) It is at rest.

Tags

NGSS.HS-PS2-1

A ball attached to a light string swings in a counterclockwise vertical circle, as shown above. Which of the following arrows represent one of the forces exerted on the ball at the moment it passes through point P? Select two answers.

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

10

• A

• B

• C

• D

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-1

NGSS.HS-PS2-4