Gravity and Circular Motion Test Retake Quiz

A car moves in a circular path at constant speed (see diagram to right).  The car is moving clockwise. What is the direction of the acceleration at the instant shown?

• Toward the center

• Straight ahead

• to the right

Which one of the following will be different if you are on the moon?

• G

• g

• Your mass

• Your inertia

 If you double the size of the net force acting on an object but do not change the object’s mass, what happens to the acceleration of the mass

• One-third as much

• It is the same

• doubled

• quadrupled

Compared to the force of Earth's gravity and you

• The Earth exerts more gravitational force on you

• You exert more gravitational force on the Earth

• The gravitational force between you and Earth is equal

Centripetal acceleration acts towards the ___________ of the circular motion

• center
• circumference
• outside
• radius

What object experiences uniform circular motion?

• A car speeding up as it turns left
• A car traveling around a roundabout at a constant speed
• A car slowing down as it crests a tall hill
• A car traveling down the road at a constant speed

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

Which represents the acceleration of the ball?

• A
• B
• C
• D

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

• Friction
• Gravity 
• Normal
• Tension

The velocity is always _____ to the line of a circle. 

• outwards
• towards the center
• tangent
• faster