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

1) a force is required to move the body upwards
2) a force is required to move the body downward
3) the body will not be in equilibrium

## If a flywheel increases its speed from 10 rpm to 20 rpm in 10 seconds, then its angular acceleration is_____________________?

D. none of the above

## In a simple harmonic motion, the position of equilibrium is always_________________?

A. stable
B. unstable
C. neutral
D. none of the above

A. 30
B. 50
C. 60
D. 80

## 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. constant
B. zero
C. maximum
D. minimum

A. f
B. 1/f
C. 1/f2
D. f2

## In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics ?

A. howe truss
B. king post truss
C. fink truss
D. warren truss

A. S = C tan q>
B. S = C cos cp
C. S = C sin cp
D. S = C cot <p

A. 50 and 75
B. 75 and 50
C. 75 and 75
D. 50 and 50

## Impulse can be obtained from a_________________?

A. force-displacement diagram
B. force-time diagram
C. velocity-time diagram
D. velocity-displacement diagram

## If a projectile is fired with an initial velocity of 10 m/sec at an angle of 60° to the horizontal, its horizontal and vertical velocity at the highest point of trajectory are___________________?

A. 0 and 5 m/sec
B. 5 m/sec and 0
C. 5 V3 m/sec and 0
D. 5 and 5V3 m/sec

## If A is the amplitude of particle executing simple harmonic motion, then the total energy E of the particle is___________________?

A. proportional to A
B. proportional to A2
C. proportional to 1/A2
D. independent of A

A. zero
B. maximum
C. minimum
D. unpredictable

## If the given forces P,, P2, P3 and P4 are such that the force polygon does not close, then the system will___________________?

A. be in equilibrium
B. always reduce to a resultant force
C. always reduce to a couple
D. both (A) and (C)

A. M’^T’
B. M’L-‘T0
C. M’L-‘T1
D. M2L’T3

A. 30°
B. 45°
C. 60°
D. 120°

A. A
B. A/2
C. A/V2
D. AV2

## Which of the following stresses is used for identifying the quality of structural steel ?

A. ultimate stress
B. yield stress
C. proof stress
D. none of the above