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The whcel of a car is rotating at the ra...

The whcel of a car is rotating at the rate of 1200 revolutions per minute. On pressing the accelerator for 10 in seconds, it'starts rotating at 4500 revolutions/minute. The angular acceleration of the wheel is

A

`30("radian")/("sec"^2)`

B

`1880("degree")/("sec"^2)`

C

`40("radian")/("sec"^2)`

D

`1980("degree")/("sec"^2)`

Text Solution

Verified by Experts

The correct Answer is:
D
`alpha =(omega_2-omega_1)/t=(2pi(n_2-n_1))/t,n_2=(4500)/60= 75("rev")/("sec")n_t=1200/60=20("rev")/("sec")`
1 Revolution `= 2Pi` Radian `=360^@" "alpha =((75-20))/10xx360^@("degree")/("sec"^2)=1980("degree")/("sec"^2)`
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