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Question

A wheel rotating with an angular speed of 600rpm is given a constant acceleration of 1800rpm2 for 10sec. The number of revolutions revolved by the wheel is.


A

125

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B

100

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C

75

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D

50

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Solution

The correct option is A

125


Step 1. Given data.

ωo=600rpm

α=1800rpm2

t=10sec=16min

Step 2. Calculating number of revolutions

As given, ω0 is the angular speed of wheel rotating

t is the time

αis the constant acceleration

Therefore by using these variables, we have

S=ωot+12αt2=600×1060+×121800×136=100+25=125revolutions

Hence, the correct option is (A).


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