1. The rotational K.E of the hoop is equal to the
A. its translational K.E
B. half than its translational K.E
C. double than its translational K.E
D. four times than its translational K.E
✅ The correct answer is option A.
Circular Motion MCQs
2. A hoop and disc have same mass and radius. Their rotational K.E are related by an equation
A. K.E hoop = K.E disc
B. K.E hoop = 2K.E disc
C. K.E hoop = 1/2K.E disc
D. K.E hoop = 4K.E disc
✅ The correct answer is option B.
3. The critical speed of an artificial satellite is
A. 8 Kms-1
B. 8.1 Kms-1
C. 7.9 Kms-1
D. 8 ms-1
✅ The correct answer is option C.
4. Geostationary satellite completes one rotation around the earth in
A. 3 hours
B. 6 hours
C. 12 hours
D. 24 hours
✅ The correct answer is option D.
5. The radius of geostationary orbit from the centre of the earth is nearly
A. 42000km
B. 36000km
C. 24000 km
D. 18000 km
✅ The correct answer is option A.
6. According to Einstein, the gravitational interaction is possible between
A. material objects only
B. material objects and electromagnetic radiation only
C. electromagnetic radiations
D. none of the above
✅ The correct answer is option B.
8. The period of a circular motion is given by
A. T = πv
B. T = πw
C. T = 2πr
D. T = 2πr/v
✅ The correct answer is option D.
9. The direction of the linear velocity of a body moving in a circle is
A. along the axis of rotation
B. along the tangent
C. directed towards the centre
D. directed away from the centre
✅ The correct answer is option B.
10. When a body moves in a circle, the angle between its linear velocity and angular velocity is always
A. 180°
B. 0°
C. 90°
D. 45°
✅ The correct answer is option C.