Mechanics

Question 1

is that branch of mechanics which deals with the motion of bodies under the action of forces.

Answer 1

Dynamics

Question 2

deals with the effects of forces on bodies at rest.

Answer 2

Statics

Question 3

Dynamics has two distinct parts:

Answer 3

Kinematics
Kinetics

Question 4

the study of motion without reference to the forces which cause motion

Answer 4

Kinematics

Question 5

relates the action of forces on bodies to their resulting motions.

Answer 5

Kinetics

Question 6

made careful observations concerning bodies in free fall, motion on an inclined plane, and motion of the pendulum.

Answer 6

Galileo (1564–1642)

Question 7

is the geometric region occupied by bodies.

Answer 7

Space

Question 8

which is generally recognized as one of the greatest of all recorded contributions to knowledge

Answer 8

Principia

Question 9

was able to make an accurate formulation of the laws of motion and, thus, to place dynamics on a sound basis.

Answer 9

Newton (1642–1727)

Question 10

an imaginary set of rectangular axes assumed to have no translation or rotation in space.

Answer 10

the primary inertial system or astronomical frame of reference

Question 11

The basic frame of reference for the laws of Newtonian mechanics

Answer 11

the primary inertial system or astronomical frame of reference

Question 12

is a measure of the succession of events and is considered an absolute quantity in Newtonian mechanics.

Answer 12

Time

Question 13

is the quantitative measure of the inertia or resistance to change in motion of a body

Answer 13

Mass

Question 14

the vector action of one body on another.

Answer 14

Force

Question 15

is a body of negligible dimensions

Answer 15

Particle

Question 16

is a body whose changes in shape are negligible compared with the overall dimensions of the body or with the changes in position of the body as a whole.

Answer 16

Rigid body

Question 17

Law I

Answer 17

A particle remains at rest or continues to move with uniform velocity (in a straight line with a constant speed) if there is no unbalanced force acting on it.

Question 18

Law II

Answer 18

The acceleration of a particle is proportional to the resultant force acting on it and is in the direction of this force.

Question 19

Law III

Answer 19

The forces of action and reaction between interacting bodies are equal in magnitude, opposite in direction, and collinear.

Question 20

Newton’s second law forms the basis for most of the analysis in dynamics.

Answer 20

F=ma