Circular motion (Unit 3) Flashcards
1
Q
Radians > Degrees?
A
x 360/2pi
2
Q
Degrees> Radians?
A
x 2pi/360
3
Q
How do we use circular motion to make cars safe around curves?
A
- Appropriate tyre design for friction
- Banking of road
4
Q
What is period?
A
-time taken for one complete circuit
5
Q
What is Frequency?
A
-the number of cycles per second
6
Q
What is a radian?
A
-A unit of measurement of angles equal to about 57.3°
7
Q
What is angular velocity?
A
- the angle θ swept out by the radius in
time
8
Q
Angular velocity units?
A
rad s^-1
9
Q
How is an object moving at constant speed but accelerating?
A
- its velocity must be changing, as velocity is a vector and the direction is constantly changing
-As the rate of change of velocity is equal to acceleration, the particle must be constantly accelerating
10
Q
Where is centripetal force and acceleration directed at?
A
-towards the centre of the circle
11
Q
What is centripetal force?
A
-the resultant force acting on a body moving at
constant speed in a circle
