Question

Which of the following statement is correct about uniform circular motion? A. The direction of the object doesn’t change B. The object moves on a rectilinear path C. Motion of a cyclist on a circular track at constant speed D. If ‘r’ is the radius of the circular path and ‘t’ is time required to complete one cycle then speed is ​

Answer 1

Answer:

(a) When a body moves in a circular path with uniform speed (constant speed), its motion is called uniform circular motion. For e.g.

(i) Artificial satellites move in uniform circular motion around the earth.

(ii) Motion of a cyclist on a circular track

(b) The speed of a body moving along a circular path is given by the formula:

Given, t=60sec

Radius, r=10.5cm=0.105m

v=

t

2πr

v=

t

22πr

=

7×60

2×22×0.105

=

420

4.62

=0.011m/s

Answer 2

Answer:

Choose B

Explanation: