Question

the wheel of car is rotating with 180 RPM car stop after 5 min of breaking find the angular acceleration of wheel​

Answer 1

α=

t

2

−t

1

ω

2

−ω

1

ω

1

=

60

2π×1200

=40π;ω

2

=

60

2π×4500

=150π

α=

10

110π

rad/sec

2

Now π radian =180

∘

∴1 rad=

π

180

∘

degree

∴ α=

π

11π×180

degrees/sec

2

=1980 degress/sec

2