Engineering Mechanics
Which of the following is an equation of linear motion?(where, u and v = Initial and final velocity of the body, a = Acceleration of the body, and s = Displacement of the body in time t seconds.)

All of these
v = u + a.t
v2 = u2 + 2a.s
s = u.t + ½ a.t2

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Engineering Mechanics
The resolved part of the resultant of two forces inclined at an angle 'θ' in a given direction is equal to

The sum of the forces multiplied by the sine of θ
The difference of the forces multiplied by the cosine of θ
The algebraic sum of the resolved parts of the forces in the given direction
The sum of the resolved parts of the forces in the given direction

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Engineering Mechanics
A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

Remain horizontal
Slant down towards direction of pull
Slant up towards direction of pull
None of these

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