What is the formula for an angle?
arc length/ radius
arc length/ time
radius x arc length
What is angular velocity measured in?
What is the direction of centripetal acceleration?
The direction in which the object is travelling
The opposite direction to which the object is travelling
Towards the centre of the circle
Away from the centre of the circle
Centripetal force is a scalar quantity.
A man is riding a bicycle along a road at a constant speed. The wheels of the bike have a radius of 30cm and an angular velocity of 15 rad/s. What is the speed of the bicycle?
According to Kepler's third law, the square of the periodic time of a satellite's orbit about a planet is inversely proportional to which of the following?
The mass of the planet
The radius of the planet
The distance between the planet and the satellite
A particle travels at at constant speed in a circle. What is its angular velocity if it completes 8 revolutions in 4 seconds?
6 π rad/s
2 π rad/s
Centrifugal force acts in the direction away from the centre of the circle.
When a satellite is orbiting the earth, its linear velocity squared is proportional to which of the following?
T = 2πr/v is the formula for centripetal acceleration