Question

A body cover the quadrant of a circle of radius 30 m in 15;sec find velocity

Answer 1

Centripetal accl. is equal to v^2/r

ac = 5^2/5 = 5m/s^2.

Tangential accl.(at) is equal to

Change in velocity/ time taken.

Change in velocity = 5-(-5) =10.

Time period =( 2*pi. R) /V = 2*pi sec.

Time taken in half revolution is pi.

at = 10/pi.