Engineering Mechanics Fundamentals

Question 1

The friction experienced by a body, when in motion, is known as

Accepted Answer

Dynamic Friction

Question 2

The minimum force required to slide a body of weight W on a rough horizontal plane is

Accepted Answer

$Wtan 	heta$

Question 3

If two equal vector forces are mutually perpendicular then the resultant force is acting at which angle as compared to one of the vector?

Accepted Answer

45 degree

Question 4

The magnitude of the resultant of the two vectors is always _____________

Accepted Answer

Depends on the angle between them

Question 5

The resultant of three equal vectors having mutual angles being 120 degree and being originated from a single point is zero.

Accepted Answer

True

Question 6

The tendency of rotation of the body along any axis is also called ___________

Accepted Answer

Torque

Question 7

In the simplification of the loading system the net force acts at the ___________ of the loading body.

Accepted Answer

Centroid

Question 8

What does the Newton’s third law states?

Accepted Answer

For every reaction there is an opposite reaction

Question 9

____________ is the phenomena that resist the movement of the two surfaces in contact

Accepted Answer

Friction

Question 10

If a material has no uniform density throughout the body, then the position of centroid and center of mass are ________

Accepted Answer

Not identical

Question 11

If an elevator travels at constant velocity, the normal reaction R is given as ______

Accepted Answer

mg

Question 12

Which of the following statements is false about forces/couple?

Accepted Answer

Resultant and equilibrant are equal in magnitude and direction

Question 13

The velocity of a body on reaching the ground from a height h, is

Accepted Answer

$\sqrt{2gh}$

Question 14

The ratio of static friction to dynamic friction is always

Accepted Answer

Greater than one

Question 15

Bus travels with a speed of 15m/s when accelerated at 0.10 $m/s^2$ from its rest position. What is the distance traveled?

Accepted Answer

1125 m