Chapter 12 - Motion In A Circle

Question 1

Linear Speed

Answer 1

Tangent to the circle. Same at all the points on the circle

Question 2

Escape Velocity

Answer 2

Loses the force acting by the centre.

Question 3

Angular Displacement

Answer 3

Displacement in terms of the angle.

Question 4

θ

Answer 4

Arc Length / Radius

Question 5

2 π Radians

Answer 5

360 Degrees

Question 6

Angular Displacement

Answer 6

Angle swept by an arc in a given particular direction.

Question 7

Angular Displacement is 1 when

Answer 7

Arc Length = Radius

Question 8

Define Radians

Answer 8

Angle subtended at the centre of the circle by an arc length equal to the radius of the circle.

Question 9

Angular Speed ( Velocity )

Answer 9

ω - omega. Does not change

Question 10

Angular Speed

Answer 10

Rate of change of angular displacement.

Question 11

ω Omega Formula

Answer 11

(θ / time) Or (s / r*t)

Question 12

Omega w Formula

Answer 12

2 π / T ( Radians / Second ) or 2 π f

Question 13

Linear Speed ( v )

Answer 13

s/t

Question 14

V Liner Speed

Answer 14

r * ω

Question 15

Centripetal Acceleration In Terms Of V And r

Answer 15

V^2 / r

Question 16

Centripetal Acceleration In Terms Of ω and r

Answer 16

r ω^2

Question 17

Centripetal Force In Terms Of V And r

Answer 17

mv^2 / r

Question 18

Centripetal Force In Terms Of ω and r

Answer 18

mr ω^2

Question 19

Centripetal Force

Answer 19

Mv^2 / r

Question 20

Centripetal Acceleration

Answer 20

• Towards the center of the circle
• dv / dt
• Acts towards the center

Question 21

Centripetal Force is not real why?

Answer 21

Any force that acts towards the center for a body in circular motion is assumed to be the centripetal force.