Question

03. In the given figure, a = 15 m s represents the
total acceleration of a particle moving in the
clockwise direction in a circle of radius R = 2.5
m at a given instant of time. The speed of the
particles is
[NEET 2016]
(1) 4.5 ms
(3) 5.7 mms
(2)5.0 ms
(4)6.2 ms​

Answer 1

Explanation:

Given : R=2.5 m a=15 m/s

2

From figure, centripetal acceleration a

c

=acos30

o

=15×0.866=13 m/s

2

Using a

c

=

R

v

2

∴ 13=

2.5

v

2

⟹v=5.7 m/