Question

62. A body is rotating with an angular velocity of 5 radians/s. After 4 seconds, the angular
velocity of the body becomes 1.3 radians per sec. The angular acceleration of the body would
be​

Answer 1

Answer:

w

0

=0 (rest)

w = 80 rad/s

t = 5 second

total angular displacement 0=w

0

t+

2

1

αt

2

or simply given by w

2

=w

0

2

+2αθ

⇒θ=

2α

w

2

−w

0

2

; α=

t

w−w

0

α= angular acceleration

we get θ=

2×

5

80−0

80

2

−0

θ=

2

80×5

=200 radian