Circular Measure

Question 1

Angular displacement

Answer 1

The change in angle in radians of a body as it rotates around a circle

Question 2

Angular displacement formula

Answer 2

^s/r

Question 3

Radian

Answer 3

The angle subtended at the centre of a circle by an arc in equal length to the radius of the circle

Question 4

From degree to radian

Answer 4

Degree × pi/180 =radian

Question 5

Angular speed

Answer 5

The rate of change in angular displacement with respect to time

Question 6

Equations of angular speed

Answer 6

w=2pi/T or 2pif

Question 7

What causes centripetal acceleration

Answer 7

Since uniform circular motion is continuously changing direction therfore constantly changing velocity it must be accelerating
Centripetal acceleration is perpendicular to the direction of linear speed

Question 8

Where does centripetal force act

Answer 8

Perpendicular to linear speed

Question 9

Centripetal acceleration

Answer 9

The acceleration of an object towards the centre of a circle when an object is in motion around a circle at a constant speed

Question 10

Centripetal acceleration formulas

Answer 10

a=v²/r a=w²r a=vw
V=rw

Question 11

Centripetal force

Answer 11

The resultant force acting towards the centre of a circle required to keep a body in uniform circular motion it is always towards the centre of the bodys rotation

Question 12

Centripetal force equation

Answer 12

F=mv²r
=mw²r
=mvw