Topic 1 ( General principle )

Question 1

is a fundamental branch of physical science studying the behavior of bodies at rest or in motion under the influence of forces.

Answer 1

Mechanics

Question 2

Mechanics is categorized into three primary areas:

Answer 2

rigid-body mechanics, deformable-body mechanics, and fluid mechanics.

Question 3

Examines bodies that do not deform under applied forces.

Answer 3

Rigid-Body Mechanics

Question 4

Subdivisions of Rigid-Body Mechanics

Answer 4

Statics, Dynamics

Question 5

Studies bodies in equilibrium (no acceleration).

Answer 5

Statics

Question 6

Focuses on bodies experiencing acceleration.

Answer 6

Dynamics

Question 7

Explores how forces cause deformation in materials.

Answer 7

Deformable-Body Mechanics

Question 8

Analyzes the behavior of fluids (liquids and gases) under forces.

Answer 8

Fluid Mechanics

Question 9

Fundamental Quantities

Answer 9

Length, Time, mass, force

Question 10

Assumes the entire mass of an object is concentrated at a point.

Answer 10

Particle

Question 11

Rigid Body

Answer 11

Treats objects as undeformable to simplify calculations.

Question 12

A body at rest stays at rest, and a body in motion stays in motion unless acted on by an external force.

Answer 12

First Law:

Question 13

Force equals mass times acceleration (
𝐹
=
𝑚
𝑎
F=ma).

Answer 13

Second law

Question 14

For every action, there is an equal and opposite reaction.

Answer 14

third law

Question 15

The gravitational force acting on a body. and Varies with gravitational field strength.

Answer 15

Weight

Question 16

Units of Measurement

Answer 16

SI Units: International system (meters, seconds, kilograms, newtons).
U.S. Customary Units: Includes feet, pounds, and seconds.