If y is force and x is velocity, then dimensions of —=r are dx2__________________?

A. M’^t’
B. M’l-‘t0
C. M’l-‘t1
D. M2l’t3

The dimensions of centrifugal force are__________________?

A. M1 l2 t2
B. M’l’t1
C. M’l’t2
D. M’l-‘t2

The unit of rotational inertia of a body in C.G.S system is________________?

A. Cm4
B. Kg-cm2
C. Gm-cm2
D. Gm-cm3

In SI units, the units of force and energy are respectively___________________?

A. Newton and watt
B. Dyne and erg
C. Newton and joule
D. Kg-wt and joule

A cable loaded with 10 kN/m of span is stretched between supports in the same horizontal line 100 m apart. If the central dip is 10 m, then the maximum and minimum pull in the cable respectively are____________________?

A. 1346.3 kn and 1500 kn
B. 1436.2 kn and 1250 kn
C. 1346.3 kn and 1250 kn
D. 1436.2 kn and 1500 kn

Impulse can be obtained from a_________________?

A. Force-displacement diagram
B. Force-time diagram
C. Velocity-time diagram
D. Velocity-displacement diagram

Which of the following is a scalar quantity ?

A. Energy
B. Momentum
C. Torque
D. Impulse

Coefficient of friction depends on__________________?

A. Nature of surfaces only
B. Area of contact only
C. Both (a) and (b)
D. None of the above

If a body is lying on a plane whose inclination with the horizontal is less than the angle of friction, then___________________?

A. 1) a force is required to move the body upwards
B. 2) a force is required to move the body downward
C. 3) the body will not be in equilibrium
D. The correct answer is?

A ladder of weight ‘w’ rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight ‘w’ is to walk to the top of it safely, is tan’1 x, where x is___________________?

A. 1/4
B. 1/3
C. 3
D. 4