Physics · Circular Motion & Momentum | MDCAT MCQ

Question

A wheel starts rotating from the result with an angular acceleration of 2 rads-2 till its angular speed becomes 6 rad/s. The angular displacement of the wheel will be equal to:

Options

A
4 rad
B
9 rad
C
12 rad
D
7 rad

Explanation

V = u + at6 = 0 + 2tt = 3 secondsØ = ut + 1/2at2Ø = 0 + 1/2 • 2 • 3²Ø = 9 radian.

It is incorrect as per the given formula.Using 1st eq. of motion in rotatory termsV = u + at , where u=06=0+2tt = 3 secondsØ = ut + 1/2at²Ø= 0+1/2.2.32Ø = 9 radian

Using 1st eq. of motion in rotatory termsV = u + at , where u=06=0+2tt = 3 secondsØ = ut + 1/2at²Ø= 0+1/2.2.32Ø = 9 radian

It is incorrect as per the given formula. Using 1st eq. of motion in rotatory termsV = u + at , where u=06=0+2tt = 3 secondsØ = ut + 1/2at²Ø= 0+1/2.2.32Ø = 9 radian