Question

8.
A car moves in a circular path of radius 14 m at
a speed of 10 m/s Evaluate
(a) Time taken to complete the circle
(1) Does the motion have uniform acceleration?
Give roasons
ii) Find the angular velocity​

Answer 1

Since, a = v^2/r = 10*10/14 = 100/14 = 7.14 m/s^2

so, t = v/a = 10/7.14 =  1.4 sec

(1) Yes, acceleration is uniform.

(2) Angular Velocity = theta/time = 360*3.14/180*7.14 = 0.88 rad/sec

Answer 2

Answer:

GIVEN :

S=10m/s

r=14m

TO FIND :

t=?

SOL:

T=d/s

we know that s=10m/s

the circumferenence of circle

=distance=2 pi r

= 2 multiply by 22/7 multiply by 14

=22 multiply by 4=88

therefore d=88 m

" t=88/10

a) t = 8.8sec

b) Yes, the car is moving with a uniform acceleration b'coz the velocity keeps increasing at a constant rate although the speed is unchanging.