Question

A car is moving at a speed of 72 km per hour the diameter of wheel 0.5 m if wheels are stop by 20 rotation by applying brakes calculate angular retardation

Answer 1

Here: Speed of car = 72 km/hr =72×518=20cm/s

Diameter of each wheel=0.52m

Number of rotation = 20

The relation for angular speed is ω=υr=200.25=80 rad/sec

Angular displacement Q=2π×20=40 π rad

The relation for angular retardation is given by

ω2=ω20+2aQ 0=(80)2+2a(40π) Or a=(80)280π=−25.5rad/s2

PLEASE MARK AS BRAINLIEST!!!!

Answer 2

Answer:

80 rads ;answer+

Explanation:

speed of car = 7w ×518=20cm/s