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Engineering Mechanics

Engineering Mechanics
One kg force is equal to

8.9 N
7.8 N
9.8 N
12 N

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Engineering Mechanics
The ratio of static friction to dynamic friction is always

Less than one
Equal to one
Greater than one
None of these

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Engineering Mechanics
The time of flight (t) of a projectile on an upward inclined plane is(where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)

t = g cos β/2u sin (α + β)
t = g cos β/2u sin (α - β)
t = 2u sin (α + β)/g cos β
t = 2u sin (α - β)/g cos β

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Engineering Mechanics
A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of

4 m
2 m
1 m
3 m

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Engineering Mechanics
If a number of forces are acting at a point, their resultant will be inclined at an angle 'θ' with the horizontal, such that

tanθ = √(ΣV + ΣH)
tanθ = ΣV × ΣH
tanθ = ΣV/ΣH
tanθ = ΣH/ΣV

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Engineering Mechanics
When the spring of a watch is wound, it will possess

Electrical energy
Strain energy
Heat energy
Kinetic energy

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MORE MCQ ON Engineering Mechanics

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