Centripetal acceleration and Centrifugal force

As this ride starts to spin in a circular motion the swings move outward.  What is the cause of this outward motion

• Gravity
• Centripetal Force
• Speed
• Inertia

In what direction does centripetal (or circular) acceleration act?

• Towards the center of the circular motion
• Away from the center of circular motion
• Acceleration is a scalar, it has no direction
• In the same direction as the circular velocity

What force causes the car to move in a circle? What type of motion would the driver feel moving him / her to the outside of the circle?

• centripetal force from friction; centrifugal 
• centripetal force from the engine; centrifugal
• centrifugal force from friction; centripetal
• centrifugal force from the engine; centripetal

A car is doing donuts in the parking lot with a circular velocity of 7.5 m/s in a radius of 5 m. What is the circular acceleration? (Write down your answer, you'll need it for the next problem!)

• 11.25 m/s²
• 37.5 m/s²
• 1.5 m/s²
• 3.333 m/s²

The car doing donuts has a mass of 235 kg. What is the force of the car?

• 2643.75 N
• 8812.5 N
• 325.5 N
• 783.25 N

A dog sits 1.50 m from the center of a merry-go-round and revolves at a tangential speed of 1.80 m/s. If the dog’s mass is 18.5 kg, what is the magnitude of the centripetal force on the dog?

• 56 N
• 21 N
• 40 N
• 98 N

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

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

• outwards
• towards the center
• tangent
• faster

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

The force directed towards the centre of the circle needed to keep the object moving in a circle.

• Centripetal force

• Centrifugal force

• Centripetal acceleration

• Angular velocity