Circular Motion in A-Level Physics

What is the radian measure of a full circle?

• 360 radians

• 2π radians

• π/2 radians

• 180 radians

How do you convert angular velocity from RPM to radians per second?

• Multiply by π and divide by 180

• Multiply by 60 and divide by 2π

• Multiply by 180 and divide by π

• Multiply by 2π and divide by 60

Which of the following is true about centripetal force?

• It is parallel to the linear velocity

• It is directed away from the center

• It is perpendicular to the linear velocity

• It is always zero

Why does the speed of an object in circular motion remain constant?

• Because there is no force acting on the object

• Because the net force is perpendicular to the velocity

• Because the net force is zero

• Because the net force is parallel to the velocity

What is the formula for centripetal acceleration?

• v / r^2

• r^2 / v

• r / v^2

• v^2 / r

In the circular motion experiment, what does the gradient of the force vs. velocity squared graph represent?

• The mass of the bung divided by the radius

• The radius of the circle

• The centripetal force

• The time period of rotation

In circular motion at an angle, what does the component R cos θ balance?

• The frictional force

• The tangential force

• The gravitational force

• The centripetal force

What is the relationship between the vertical component of tension and weight in a conical pendulum?

• T sin θ = mg

• T cos θ = mg

• T = mv^2 / r

• T = mg

In vertical circular motion, when are the normal reaction and gravitational force in the same direction?

• At the top of the circle

• At the bottom of the circle

• They are never in the same direction

• At the side of the circle

What is the formula for speed in circular motion at an angle?

• v = √(gr tan θ)

• v = √(gr)

• v = √(gr sin θ)

• v = √(gr cos θ)