A fly wheel is accelerated uniformly from rest and rotates through 5 r

1.	A fly wheel is accelerated uniformly from rest and rotates through 5 rad in the first second. The angle rotated by the fly wheel in the next second, will be :(A) 7.5 rad (B) 15 rad(C) 20 rad (D) 30 rad
Answer» Correct option is (B) 15 rad The angle rotated during the first two second is \(= \frac 1 2 \times (10)(2)^2\) = 20 rad Thus, the angle rotated during the second is = 20 - 5 = 15 rad

A fly wheel is accelerated uniformly from rest and rotates through 5 rad in the first second. The angle rotated by the fly wheel in the next second, will be :(A) 7.5 rad (B) 15 rad(C) 20 rad (D) 30 rad

Answer»

Correct option is (B) 15 rad

The angle rotated during the first two second is \(= \frac 1 2 \times (10)(2)^2\)

= 20 rad

Thus, the angle rotated during the second is

= 20 - 5

= 15 rad

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A fly wheel is accelerated uniformly from rest and rotates through 5 rad in the first second. The angle rotated by the fly wheel in the next second, will be :(A) 7.5 rad (B) 15 rad(C) 20 rad (D) 30 rad

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