Question

A rigid body rotates about a fixed axis with variable
angular speed (in rad/s) 0 = 3 - 5t at any time t
(in second). The angle through which it rotates
before it comes to rest is [NCERT Pg. 170]
9
(1)
rad
rad
10
10
(2)
9
(4) 10 rad
(3) 2 rad
1
.
times
duos to​

Answer 1

Answer:

ω=a−bt=0

t=a/b

θ=∫ωdt=∫

0

ab

(a−bt)dt

=[at−

2

bt

2

]

0

a/b

=a.

b

a

−

2

b

[

b

2

a

2

]

=

2b

a

2

B is the correct option