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Engineering Mechanics

Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u. cosα/g
t = 2u. tanα/g
t = 2u. sinα/g
t = 2u/g.sinα

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Engineering Mechanics
If the gravitational acceleration at any place is doubled, then the weight of a body will be

√2.g
g
2g
g/2

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Engineering Mechanics
Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the balls with velocity ‘v’ is made to strike the second ball. Both the balls after impact will move with a velocity

v/4
v/8
v
v/2

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Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P tanθ/2
2P sinθ/2
2P cosθ/2
2P cotθ/2

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Engineering Mechanics
The velocity ratio of a single purchase crab winch can be increased by

Increasing the length of the handle
Increasing the radius of the load drum
All of these
Increasing the number of teeth of the pinion

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Engineering Mechanics
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

50
400
100
200

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MORE MCQ ON Engineering Mechanics

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