# Engineering Mechanics- An Introduction Flashcards

1
Q

What is the unit of mass?

A

Kilograms (kg)

2
Q

What is the force of gravity (used in Engineering Studies)?

A

10m/s^2

3
Q

Other words that imply force?

A

Force = Load = Push = Pull = Tension = Thrust = Weight

4
Q

What are scalar quantities?

A

Only have magnitude (or size). and do NOT have direction.

5
Q

What are vector quantities?

A

Have both magnitude (or size) and direction.

6
Q

In a diagram, the following components are shown by what features:
Magnitude, Sense, Direction, Point of Application

A

Magnitude = the given force.
Sense = shown by arrow (of the force).
Direction = shown by the angle off the horizontal axis.
Point of Application = where the vector acts.

7
Q

Concurrent forces are?

A

Forces all meeting at the one point; forces all intersect at some point.

8
Q

Co-planar forces are?

A

Forces acting in the same plane; forces applied to the same surface.

9
Q

Co-linear forces are?

A

Forces acting along the same line.

10
Q

How are vector forces added?

A

By drawing to scale.

11
Q

How are vector forces subtracted?

A

Adding the opposite sense vector.

12
Q

What is the resultant?

A

The ONE force which takes the place of ALL other forces and has the same total effect; sum of all forces.

13
Q

What is the equilibriant?

A

The force which is EQUAL but has an OPPOSITE sense to the resultant. This force neutralises the effect of all forces acting.

14
Q

What are rectangular components of a force?

A

The horizontal and vertical components of a force.

15
Q

The principle of transmissibility of forces states…

A

that forces can act anywhere along the line of action of the force and have the same effect, i.e. strongest person is a tug-o-war match will have the same effect regardless if positioned at the back, middle or front.