Engineering Mechanics MCQs

Question 1

The velocity of a particle moving with simple harmonic motion is _________ at the mean position.

Accepted Answer

Maximum

Answer

Zero

Answer

Minimum

Answer

None of these

Question 2

The time of flight (t) of a projectile on an upward inclined plane is (where u = Velocity of projection, $$\alpha $$ = Angle of projection and $$\beta $$ = Inclination of the plane with the horizontal.)

Accepted Answer

$${	ext{t}} = \frac{{2{	ext{u}}\sin \left( {\alpha - \beta } ight)}}{{{	ext{g}}\cos \beta }}$$

Answer

$${	ext{t}} = \frac{{{	ext{g}}\cos \beta }}{{2{	ext{u}}\sin \left( {\alpha - \beta } ight)}}$$

Answer

$${	ext{t}} = \frac{{{	ext{g}}\cos \beta }}{{2{	ext{u}}\sin \left( {\alpha + \beta } ight)}}$$

Answer

$${	ext{t}} = \frac{{2{	ext{u}}\sin \left( {\alpha + \beta } ight)}}{{{	ext{g}}\cos \beta }}$$

Question 3

One joule is equal to

Accepted Answer

1 N-m

Answer

0.1 N-m

Answer

10 N-m

Answer

100 N-m

Question 4

One joule means that

Accepted Answer

Work is done by a force of 1 N when it displaces a body through 1 m

Answer

Work is done by a force of 1 kg when it displaces a body through 1 m

Answer

Work is done by a force of 1 dyne when it displaces a body through 1 cm

Answer

Work is done by a force of 1 g when it displaces a body through 1 cm

Question 5

One kg force is equal to

Accepted Answer

9.8 N

Answer

7.8 N

Answer

8.9 N

Answer

12 N

Question 6

If a body is acted upon by a number of coplanar non-concurrent forces, it may

Accepted Answer

All of these

Answer

Rotate about itself without moving

Answer

Move in any one direction rotating about itself

Answer

Be completely at rest

Question 7

The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as:

Accepted Answer

Newton's second law of motion

Answer

Newton's first law of motion

Answer

Newton's third law of motion

Answer

None of these

Question 8

When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as

Accepted Answer

Compound pendulum

Answer

Simple pendulum

Answer

Torsional pendulum

Answer

Second's pendulum

Question 9

When a body falls freely under gravitational force, it possesses __________ weight.

Accepted Answer

No

Answer

Minimum

Answer

Maximum

Answer

None of these