IB 6.1 circular motion 1

Where does acceleration move an object towards when it is experiencing circular motion?

• the centre of the circle
• left
• right
• up

An airplane turns in a horizontal plane, when it turns...

• it inclines outward
• its wings become vertical
• it inclines inwards
• it remains horizontal

What is the linear motion of an object when it is undergoing circular motion?

• linear velocity is constant
• speed and linear velocity is constant
• speed is constant but linear velocity is changing
• speed is changing but linear velocity is constant

A car makes a turn at speed v. The radius of the turn is r and the centripetal force on the car is F. If later the same car goes in the same curve at speed 2v, the centripetal force is

• 0.5 F

• F

• 2F

• 4F

There is an object moving with constant speed in circular motion. What can you say about the resultant force acting on the object?

• It has constant magnitude.
• It has constant magnitude and direction.
• It is always 0
• It has constant direction

When are velocity and acceleration aimed in the same direction?

• At the top of the revolution
• At the bottom of the revolution
• At any point in the revolution
• N e v e r

What causes centripetal acceleration?

• Change in magnitude

• Change in the direction of the velocity vector

• Change in angular displacement

• change in position

What is the unit used in Physics for average angular velocity?

• revolution per minute
• revolution per second
• radian per second
• radian per minute

Hubert does one loop on a merry go round of radius 8m at a speed of 4(pi) m/s. Calculate the angular velocity in terms of pi

• 4pi

• pi/2

• 1/pi

• 4/pi

the force that provides the centripetal acceleration that causes a car to go round a bend in the road is provided by

• the force produced by the car engine acting on the wheels
• the friction between the tyres the road
• the weight of the car
• the force exerted by the driver on the steering wheel