Page 107 - eEISBN FINALIZE

5. A grinding wheel starts from rest reaching a maximum speed of 1910 rpm in 3.7 seconds.

Find the uniform angular acceleration.

-1
(54.05 rad s )

6. One energy wheel is accelerated uniformly for 6 s from a rest position and reaches a
speed of 2600 rpm. A few minutes later it deceleration uniformly from the speed of 140 s
before it rest again. The total time of the movement is 7 minutes, find out:

i. Number of rotation of the entire energy wheel.

-2
ii.The angular acceleration of the energy wheel in rad s .

2
(15036 rotation, 45.38 rad s )

7. A car have diameter wheels 0.5 m is moving with a velocity of 15 ms-1. If the car can be

stopped within 4 seconds, calculate the number of wheels when it is stopped.

(19.10 rotation)

8. At one time a point at the edge of wheel 40 mm diameter is moving with a linear
-2
-1
velocity of 4 ms and a linear acceleration of 0.62 ms . Calculate:

-2
i. The angular acceleration of the wheel is in rad s .
-1
ii. Angular velocity in rads
-2
-1
(31 rads , 200 rads )

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