01. Angular Displacement, Velocity and Acceleration
Rotational Motion

149802 A body of mass \(10 \mathrm{Kg}\) is attached to a wire 0.3 m long. Its breaking stress is \(4.8 \times 10^{7} \mathrm{~N} / \mathrm{m}^{2}\). The area of cross-section of the wire is \(10^{-6} \mathrm{~m}^{2}\). The maximum angular velocity with which it can be rotated in a horizontal circle is

1 \(6 \mathrm{rad} / \mathrm{s}\)
2 \(5 \mathrm{rad} / \mathrm{s}\)
3 \(7 \mathrm{rad} / \mathrm{s}\)
4 \(4 \mathrm{rad} / \mathrm{s}\)
Rotational Motion

149803 A planet is moving in a circular orbit. It completes 2 revolutions in 360 days. What is its angular frequency?

1 \(1.5 \times 10^{-2} \mathrm{rad} /\) day
2 \(2.5 \times 10^{-2} \mathrm{rad} /\) day
3 \(3.5 \times 10^{-2} \mathrm{rad} /\) day
4 \(4.5 \times 10^{-2} \mathrm{rad} /\) day
Rotational Motion

149804 A wheel is rotating at 900 r.p.m. about its axis. When power is cut off it comes to rest in 1 minute. The angular retardation in \(\mathrm{rad} / \mathrm{s}^{2}\) is

1 \(\pi / 2\)
2 \(\pi / 4\)
3 \(\pi / 6\)
4 \(\pi / 8\)
Rotational Motion

149805 A flywheel starts from rest and rotates at a constant acceleration of \(2 \mathrm{rads}^{-2}\). The number of revolutions that it makes in first \(10 \mathrm{~s}\) is

1 16
2 24
3 32
4 8
Rotational Motion

149802 A body of mass \(10 \mathrm{Kg}\) is attached to a wire 0.3 m long. Its breaking stress is \(4.8 \times 10^{7} \mathrm{~N} / \mathrm{m}^{2}\). The area of cross-section of the wire is \(10^{-6} \mathrm{~m}^{2}\). The maximum angular velocity with which it can be rotated in a horizontal circle is

1 \(6 \mathrm{rad} / \mathrm{s}\)
2 \(5 \mathrm{rad} / \mathrm{s}\)
3 \(7 \mathrm{rad} / \mathrm{s}\)
4 \(4 \mathrm{rad} / \mathrm{s}\)
Rotational Motion

149803 A planet is moving in a circular orbit. It completes 2 revolutions in 360 days. What is its angular frequency?

1 \(1.5 \times 10^{-2} \mathrm{rad} /\) day
2 \(2.5 \times 10^{-2} \mathrm{rad} /\) day
3 \(3.5 \times 10^{-2} \mathrm{rad} /\) day
4 \(4.5 \times 10^{-2} \mathrm{rad} /\) day
Rotational Motion

149804 A wheel is rotating at 900 r.p.m. about its axis. When power is cut off it comes to rest in 1 minute. The angular retardation in \(\mathrm{rad} / \mathrm{s}^{2}\) is

1 \(\pi / 2\)
2 \(\pi / 4\)
3 \(\pi / 6\)
4 \(\pi / 8\)
Rotational Motion

149805 A flywheel starts from rest and rotates at a constant acceleration of \(2 \mathrm{rads}^{-2}\). The number of revolutions that it makes in first \(10 \mathrm{~s}\) is

1 16
2 24
3 32
4 8
Rotational Motion

149802 A body of mass \(10 \mathrm{Kg}\) is attached to a wire 0.3 m long. Its breaking stress is \(4.8 \times 10^{7} \mathrm{~N} / \mathrm{m}^{2}\). The area of cross-section of the wire is \(10^{-6} \mathrm{~m}^{2}\). The maximum angular velocity with which it can be rotated in a horizontal circle is

1 \(6 \mathrm{rad} / \mathrm{s}\)
2 \(5 \mathrm{rad} / \mathrm{s}\)
3 \(7 \mathrm{rad} / \mathrm{s}\)
4 \(4 \mathrm{rad} / \mathrm{s}\)
Rotational Motion

149803 A planet is moving in a circular orbit. It completes 2 revolutions in 360 days. What is its angular frequency?

1 \(1.5 \times 10^{-2} \mathrm{rad} /\) day
2 \(2.5 \times 10^{-2} \mathrm{rad} /\) day
3 \(3.5 \times 10^{-2} \mathrm{rad} /\) day
4 \(4.5 \times 10^{-2} \mathrm{rad} /\) day
Rotational Motion

149804 A wheel is rotating at 900 r.p.m. about its axis. When power is cut off it comes to rest in 1 minute. The angular retardation in \(\mathrm{rad} / \mathrm{s}^{2}\) is

1 \(\pi / 2\)
2 \(\pi / 4\)
3 \(\pi / 6\)
4 \(\pi / 8\)
Rotational Motion

149805 A flywheel starts from rest and rotates at a constant acceleration of \(2 \mathrm{rads}^{-2}\). The number of revolutions that it makes in first \(10 \mathrm{~s}\) is

1 16
2 24
3 32
4 8
Rotational Motion

149802 A body of mass \(10 \mathrm{Kg}\) is attached to a wire 0.3 m long. Its breaking stress is \(4.8 \times 10^{7} \mathrm{~N} / \mathrm{m}^{2}\). The area of cross-section of the wire is \(10^{-6} \mathrm{~m}^{2}\). The maximum angular velocity with which it can be rotated in a horizontal circle is

1 \(6 \mathrm{rad} / \mathrm{s}\)
2 \(5 \mathrm{rad} / \mathrm{s}\)
3 \(7 \mathrm{rad} / \mathrm{s}\)
4 \(4 \mathrm{rad} / \mathrm{s}\)
Rotational Motion

149803 A planet is moving in a circular orbit. It completes 2 revolutions in 360 days. What is its angular frequency?

1 \(1.5 \times 10^{-2} \mathrm{rad} /\) day
2 \(2.5 \times 10^{-2} \mathrm{rad} /\) day
3 \(3.5 \times 10^{-2} \mathrm{rad} /\) day
4 \(4.5 \times 10^{-2} \mathrm{rad} /\) day
Rotational Motion

149804 A wheel is rotating at 900 r.p.m. about its axis. When power is cut off it comes to rest in 1 minute. The angular retardation in \(\mathrm{rad} / \mathrm{s}^{2}\) is

1 \(\pi / 2\)
2 \(\pi / 4\)
3 \(\pi / 6\)
4 \(\pi / 8\)
Rotational Motion

149805 A flywheel starts from rest and rotates at a constant acceleration of \(2 \mathrm{rads}^{-2}\). The number of revolutions that it makes in first \(10 \mathrm{~s}\) is

1 16
2 24
3 32
4 8
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