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.Management Sciences
Category: Circular Motion
If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is________________?
0
A. At the highest point
B. At the lowest point
C. At any point during motion
D. At the point where gravity is not acting
When a body is whirled in a horizontal circle by means of a string the centripetal force is supplied by______________?
A. Mass of a body
B. Velocity of body
C. The tension in the string
D. Centripetal acceleration
A satellite moving around the earth constitutes______________?
A. An inertial frame of reference
B. Non-inertial frame
C. Neither inertial nor non-inertial
D. Both inertial and non-inertial
In case of planets the necessary acceleration is provided by______________?
A. Gravitational force
B. Frictional force
C. Coulomb force
D. Centripetal force
If a wheel of radius r turns through an angle of 30° then the distance through which any point on its rim moves is______________?
A. π /3 x r
B. π/6 x r
C. V/30 x r
D. π / 180 x r
How many days would be in a year if the distance between the earth and the sun were reduced to half of its present value (assuming circular orbit) ?
A. 365 days
B. 730 days
C. 329 days
D. 129 days
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
A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position the tension in the string is______________?
A. Maximum
B. Zero
C. Equal to the weight of the stone
D. Less than the weight of the stone
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