5.2

Question 1

Radian

Answer 1

The angle subtended at the center of a circle when the arc length is equal to the radius of the circle

Question 2

Period

Answer 2

Time taken in seconds for one complete circular path

Question 3

Angular velocity

Answer 3

The rate of angular motion, 2pi/ T, measured in radians per second

Question 4

Centripetal acceleration

Answer 4

The acceleration of an object moving with uniform circular motion, it is directed radially inwards towards the center of the circle, perpendicular to the velocity vector at any instant

Question 5

Centripetal force

Answer 5

Resultant force on an object, acting towards the center of the circle, causing it to move in a circular path
(Not an actual force, a label for circular inward forces)

Question 6

Circular motion using a whirling bung

Answer 6

Bung on string through tube attached to weights, mark on string, spin bung so radius is length to mark on string, count 10 revolutions, find speed
Repeat adjusting weights, keeping radius constant
Plot F against v^2

Question 7

Reaction force in circular motion

Answer 7

At top, reaction smallest
At bottom, reaction largest
Reaction force always centripetal