When a body falls freely under gravitational force, it possesses maximum weight

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Question
When a body falls freely under gravitational force, it possesses
Options
A. maximum weight
B. minimum weight
C. no weight
D. no effect on its weight.

Correct Answer

no weight

Applied Mechanics problems

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1. Centre of gravity of a thin hollow cone lies on the axis of symmmetry at a height of
Options
A. one-half of the total height above base
B. one-third of the total height above base
C. one-fourth of the total height above base
D. none of these.

5. A particle is dropped from the top of a tower 60 m high and another is projected upwards from the foot of the tower to meet the first particle at a height of 15.9 m. The velocity of projection of the second particle is
Options
A. 16 m/sec
B. 18 m/sec
C. 20 m/sec
D. 22 m/sec.

6. Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for
Options
A. half oscillation
B. quarter oscillation
C. complete oscillation
D. none of these.

7. The piston of a steam engine moves with a simple harmonic motion. The crank rotates 120 r.p.m. and the stroke length is 2 metres. The linear velocity of the piston when it is at a distance of 0.5 metre from the centre, is
Options
A. 5.88 m/sec
B. 8.88 m/sec
C. 10.88 m/sec
D. 12.88 m/sec.

9. The gravitational force makes a satellite go round the earth in a circular orbit, if it is projected with an initial velocity of
Options
A. 8.04 km/sec at a height of 285 km
B. 11.11 km/sec at a height of 37, 400 km
C. 11.26 km/sec, the satellite escapes the pull of the earth
D. all the above.

10. The point about which combined motion of rotation and translation of a rigid body takes place, is known as
Options
A. Virtual centre
B. Instantaneous centre
C. Instantaneous axis
D. Point of rotation
E. All the above.

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