Circular Motion & Newton's Law of Gravity

Which of the following depict tangential velocity (or speed) of the blowing ball?

• A

• B

• C

• D

Which represents the centipetal acceleration of the ball?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

How does the gravitational force the Earth exerts on the sun compare to the gravitational force the sun exerts on the Earth?

• The gravitational force the sun exerts on the Earth is larger

• The gravitational force the Earth exerts on the sun is larger

• Their gravitational forces are equal

• There is not enough information

Tags

NGSS.HS-PS2-4

As two objects move apart, what happens to the force of gravity between them?

• The force of gravity decreases proportionally

• The force of gravity decreases inversely

• The force of gravity decreases exponentially

• The force of gravity decreases inversely exponentially

Tags

NGSS.HS-PS2-4

A race car completes three laps of a circular track with a radius of 35 m in 9.0 seconds. Determine the speed of the car.

• 3.9 m/s

• 73.3 m/s

• 24.4 m/s

• 1.0 m/s

Bruno the bat has a mass of 0.58 kg and flies at a speed of 0.8 m/s in circle of radius 0.5 m. What is his acceleration?

• 0.25 m/s²

• 1.3 m/s²

• 1.6 m/s²

• 0.74 m/s²

Tags

NGSS.HS-PS2-1

A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?

• A
• B
• C
• D

The linear or tangential velocity is always _____

• parallel to the radius/acceleration.

• towards the center

• perpendicular to the radius/acceleration.

• away from the center

 2600 rev/min is equivalent to which of the following?

• 2600 rad/s 
• 43.3 rad/s 
• 273 rad/s
• 60 rad/s

Tags

CCSS.HSF.TF.A.1

As the distance between 2 objects increases, what happens to gravitational force?

• increases
• decreases
• stays the same
• i don't know

Tags

NGSS.HS-PS2-4