Circular motion

What is the tangential velocity if the net force keeping it in a circle is 150 N when a 3 kg toy plane flies in a 2 m radius circle?

• 10 m/s

• 100 m/s

• 225 m/s

• 15 m/s

A toy train moves in a circular track with a velocity of 2.2 m/s, the axis of rotation is 1.8 m. What is its centripetal acceleration?

• 1.22 m/s²

• 0.81 m/s²

• 2.69 m/s²

• 1.47 m/s²

A toy train moves in a circular track with a velocity of 2.2 m/s, the axis of rotation is 1.8 m. What is its centripetal acceleration?

• 1.22 m/s²

• 0.81 m/s²

• 2.69 m/s²

• 1.47 m/s²

Which is true about net force keeping it in a circle and centripetal acceleration?

• The centripetal acceleration is always pointing toward the center of an orbit and the net force keeping it in a circle is always pointing outward

• The centripetal acceleration is always pointing outward from the center of an orbit and the net force keeping it in a circle is always pointing inward

• The centripetal acceleration is always pointing toward the center of an orbit and the net force keeping it in a circle also pointing toward the center but in a totally different location

• The centripetal acceleration is always pointing toward the center of an orbit and the net force keeping it in a circle also pointing toward the center and in the same exact location as the centripetal acceleration

At the position shown in the diagram, which arrow indicates the direction of the centripetal acceleration of the cart?

• A

• B

• C

• D

A 10kg car travels at a constant speed of 20.0 m/s around a horizontal circular track. Which diagram correctly represent the direction of the car's velocity (v) and the direction of the net force keeping it in a circle acting on the car at a particular moment?

• 
• 
• 
• 

The time taken for one complete cycle is called the...

• Period

• Frequency

• Angular velocity

What happens to an object's speed as the radius is cut in half?

• It is halved

• It doubles

• It remains unchanged.

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

• outwards
• towards the center
• tangent
• faster

What happens to the net force keeping an object in a circle if the radius is doubled?

• it is halved

• it is doubled

• it remains unchanged

• Impossible to determine