Mechanics

Question 1

What is the branch of engineering mechanics which refers to the study of stationary rigid body?

Answer 1

Statics

Question 2

What is the branch of engineering mechanics which refers to the study of rigid body in motion under the action of forces?

Answer 2

Dynamics

Question 3

What is the branch of engineering mechanics which refers to the study of a rigid body in motion without reference to the force that causes the motion?

Answer 3

Kinematics

Question 4

What refers to the force that holds part of the rigid body together?

Answer 4

Internal force

Question 5

What is the science that describes and predicts the effect on bodies at rest or in motion by forces acting on it?

Answer 5

Engineering Mechanics

Question 6

Newton’s First Law of Motion is also called

Answer 6

Law of Intertia

Question 7

Newton’s Second Law of Motion is also called

Answer 7

Law of Acceleration

Question 8

Newton’s Third Law of Motion is also called

Answer 8

Law of Action-Reaction

Question 9

________ states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

Answer 9

Newton’s first law of motion

Question 10

________ states that the acceleration produced by a net force on an object is directly proportional to the magnitude of the net force, is in the same direction as the net force, and is inversely proportional to the mass of the body.

Answer 10

Newton’s second law of motion

Question 11

_______ states that for every action (force) in nature there is an equal and opposite reaction.

Answer 11

Newton’s third law of motion

Question 12

_____ is the tendency of an object to resist changes in its state of motion

Answer 12

inertia

Question 13

________ is the force between an object in motion and the surface on which it moves

Answer 13

friction

Question 14

the english unit for force (F) is

Answer 14

pound-force (lbf)

Question 15

the english unit for mass (m) is

Answer 15

slugs

Question 16

the english unit for acceleration (a) is

Answer 16

feet per second per second (ft/s^2)

Question 17

1 Newton is equal to ____ dyn.

Answer 17

10^5

Question 18

motion moving in a straight line

Answer 18

rectilinear motion

Question 19

motion moving at a constant speed or velocity

Answer 19

rectilinear motion uniform motion

Question 20

motion moving at a constant acceleration

Answer 20

rectilinear motion uniform acceleration

Question 21

As a projectile thrown upward moves in its parabolic path, at what point along its path are the velocity and acceleration vectors for the projectile perpendicular to each other?

Answer 21

maximum height

Question 22

what is the force opposing the movement of an object on a surface?

Answer 22

friction

Question 23

friction force when the object is not moving

Answer 23

static friction

Question 24

friction force between moving objects/surfaces

Answer 24

kinetic friiction

Question 25

friction is always perpendicular to the applied force, true or false?

Answer 25

false, friction is always parallel to the applied force

Question 26

normal force is always parallel to friction, true or false?

Answer 26

false, normal force is always perpendicular to friction

Question 27

what is responsible for the change of the object’s speed in circular motion?

Answer 27

normal acceleration

Question 28

what is responsible for the change of the object’s direction in circular motion?

Answer 28

tangential acceleration

Question 29

what is the force that pushes an object towards the center of the circle?

Answer 29

centripetal force

Question 30

what is the force that pushes an object away from the center of the circle?

Answer 30

centrifugal force