Circular Motion

Centripetal acceleration always points

• in the direction of the object's motion

• in the opposite direction of the object's motion

• towards the center of the circle

• towards the outside of the circle

What is the force that causes centripetal acceleration when a car goes around a curve?

• Friction
• Gravity 
• Normal
• Tension

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

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

Joe has a mass of 50 kg, and Sally has a mass of 30 kg. They have a gravitational force between each other of 4x10^-7 N. What is the separation (r) between them?

• 0.5 m

• 1.0 m

• 0.25 m

• 0.75 m

Tags

NGSS.HS-PS2-4

At what distance from the sun is the gravitational force due to the sun on an object zero?

• Once you get farther away than Pluto.

• It is not possible, the sun's gravity will always affect you

• 50 light-years

• We do not know, since no man-made object has traveled that far

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

How does the force of gravity between two objects change when the distance between them is 5 times larger?

• 5 times more

• 5 times less

• 25 times more

• 25 times less

Tags

NGSS.HS-PS2-4

Which path represents the acceleration of the ball?

• A

• B

• C

• D

Which path represents the velocity of the ball?

• A

• B

• C

• D

Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.

• 10 N
• 20 N
• 30 N
• 40  N

Tags

NGSS.HS-PS2-1

Calculate the velocity of an object moving around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s².

• 2.4 m/s

• 3.6 m/s

• 3.9 m/s

• 4.2 m/s