5.2 Circular motion

Question 1

radian

Answer 1

the angles subtended at the centre of a circle when the arc is equal to the radius of the circle

Question 2

period

Answer 2

the time taken in seconds for one complete circular path

Question 3

angular velocity

Answer 3

the rate of angular rotation, measured in radians per second

Question 4

centripetal acceleration

Answer 4

the acceleration of an object moving with uniform circular motion. directed radially inwards towards the centre of the circle, perpendicular to the velocity vector at any instant

Question 5

centripetal force

Answer 5

the resultant force on an object acting towards the centre of the circle causing it to move in a circular path

Question 6

Investigation of circular motion

Answer 6

whirling bung, measure the time for a revolution, plot F against v^2. the gradient should be a straight line = m/r

Question 7

Conical pendulum equations (horizontal)

Answer 7

TSin< = (mv^2)/R

Question 8

Conical pendulum equations (Vertical)

Answer 8

TCos< = mg

Question 9

Conical pendulum equations (resultant)

Answer 9

Tan< = (v^2)/(Rg)