Question

The wheel of a car is rotating at the rate of 20rev/s. When brakes are applied, it comes to rest in evolutions the wheel will 30s. Assuming that the acceleration is uniform, find how many make before coming to rest.​

Answer 1

Answer:

FOrmula pakana bhul gaya

Explanation:

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

=