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11
A block of weight 50 kg is placed on a horizontal plane. When a horizontal force of 18 kg is applied, the block is just on the point of motion. The angle of friction is
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Answer: Option C
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12
In a simple harmonic motion, the position of equilibrium is always
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Answer: Option A
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13
The velocity ratio of an inclined plane of inclination ‘θ’ with horizontal for lifting a load is
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Answer: Option D
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14
The maximum displacement of a particle executing S.H.M. corresponds to
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Answer: Option B
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15
A force P of 50 N and another force Q of unknown magnitude act at 90° to each other. They are balanced by a force of 130 N. The magnitude of Q is
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Answer: Option D
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16
If two forces each equal to ‘T’ in magnitude act at right angles, their effect may be neutralized by a third force acting along their bisector in opposite direction whose magnitude will be
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Answer: Option C
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17
If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is
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Answer: Option C
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18
Kinetic friction may be defined as
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Answer: Option B
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19
Energy may be defined as
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Answer: Option B
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20
A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about (Assume g = 10 m/sec2)
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Answer: Option A
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