Physics for Engineers

Question 1

two types of physical quantities

Answer 1

scalar and vector

Question 2

finding the sum of magnitudes and directions

Answer 2

vector addition

Question 3

finding the sum of magnitudes only

Answer 3

scalar addition

Question 4

translational motion along straight path

Answer 4

rectilinear motion

Question 5

translational motion along curved path

Answer 5

curvilinear motion

Question 6

branch of classical mechanics that describes the motion of objects without considering the forces that cause the said movement

Answer 6

kinematics

Question 7

• combination of horizontal and vertical
• rectilinear motion which creates a curved path

Answer 7

projectile motion

Question 8

branch of classical mechanics that deals with the forces involved in motion

Answer 8

kinetics

Question 9

an interaction between two bodies or between a body and its environment

Answer 9

force

Question 10

long-range forces

Answer 10

magnetic, electric, gravitational

Question 11

contact forces

Answer 11

applied, spring, drag, frictional, normal

Question 12

it is the magnitude of the net force required to prevent the body from falling freely

Answer 12

weight

Question 13

the W (weight) of a body is equal to the magnitude F of the gravitational force on the body (true or false)

Answer 13

true

Question 14

this force is always perpendicular to the surface that applied it

Answer 14

normal force

Question 15

this force is caused by the roughness of the surfaces in contact with each other

Answer 15

friction

Question 16

a force applied by a rope/cord which is always directed away from the body it is attached to

Answer 16

tension

Question 17

it is a sketch of the body showing all forces that act in it

Answer 17

free-body diagram

Question 18

newton’s first law

Answer 18

law of inertia

Question 19

an object at rest stays at rest unless acted on by an external force

Answer 19

law of inertia

Question 20

newton’s second law

Answer 20

law of acceleration

Question 21

• the acceleration of an object is directly proportional to the net force acting on it
• the reciprocal of the mass of the object is the constant of proportionality

Answer 21

law of acceleration

Question 22

newton’s third law

Answer 22

law of action-reaction

Question 23

two forces have the same magnitude but are opposite in direction

Answer 23

law of action-reaction