Physics

Question 1

Pressure

Answer 1

A scalar quantity similar to stress but as applied to liquids and gasses.

common unit- TORR
SI unit - Pascal

Question 2

Strain

Answer 2

The relative Amount of deformation of a body due to stress

Strain= Displacement/ Length

Question 3

Frictional Force

Answer 3

Force which tends to oppose the parallel motion of the two surfaces in contact.
Two factors which affect the magnitude of the frictional force are: The coefficient of friction normal force applied to the object being moved

Question 4

Stress

Answer 4

A vector quantity equal to the total force divided by the are over which the force acts

Stress= Force/Area

Question 5

Shear

Answer 5

Type of force that tends to cut or tear an object

Question 6

Compression

Answer 6

Type of force that tends to compress or push a body together

Question 7

Tension

Answer 7

Force that tends to pull a body apart

Question 8

Weight

Answer 8

A special type of force exerted by massive body on a less massive body.

W=mg

Question 9

Force

Answer 9

A Vector that tends to produce acceleration of a body.

F=ma

EG- Newton
SI- Joules

Question 10

Acceleration

Answer 10

The rate of change of velocity

Acceleration= Change in velocity/ Time interval

Question 11

Relative Speed

Answer 11

The difference in speed of two objects in relation to each other

Question 12

Average Speed

Answer 12

Total distance traveled divided by the time it took.

Total distance/ Total time

Question 13

Instantaneous Speed

Answer 13

How Fast an object is moving at a particular time

Question 14

Displacement

Answer 14

A measure of the straight-line distance from one point to another

Question 15

Distance

Answer 15

A measure of how far an object travels from one point to another

Question 16

Speed

Answer 16

The rate of change of the position of an object

Question 17

Nonlinear Motion

Answer 17

Motion NOT in a straight line

Question 18

Linear Motion

Answer 18

Motion in a straight line

Question 19

Scalar

Answer 19

Has only magnitude
Speed
distance
time
energy
temperature
mass

Question 20

Vector

Answer 20

Has magnitude and direction
Displacement
acceleration
velocity
force
gravity

Question 21

Motion

Answer 21

The change of position of an object relative to a reference frame

Question 22

Newton’s 3rd Law

Answer 22

When one object exerts a force on a second object, the second object experts an equal and opposite force on the first object.

Question 23

Fluid Mechanic Pressure Unit

Answer 23

PSI (pounds per square inch)

Question 24

Normal Force

Answer 24

The perpendicular reaction force between the object and the surface

Question 25

Coefficient of Friction

Answer 25

"How rough" the surface is between the object in contact

Question 26

Momentum

Answer 26

A vector. Measures how difficult it is to stop a moving body. P=mv

Question 27

The Relationship Between Force and Momentum

Answer 27

Greater the force on an object, the greater the acceleration & momentum Velocity increases, Momentum increases

Question 28

Work

Answer 28

Energy expended when a force succeeds a force moved through a distance Wk (joules)= Fd

Question 29

Energy

Answer 29

The ability to do work or cause change a scalar quantity units are in Joules

Question 30

Mechanical Energy

Answer 30

Energy in motion

Question 31

Potential Energy

Answer 31

Energy stored in an object due to its position

Question 32

Kinetic Energy

Answer 32

Energy an object possesses because of its motion

Question 33

Internal Energy

Answer 33

Energy stopped in an object a result of its temperature

Question 34

Conservation of Energy

Answer 34

Energy can not be created or destroyed, only altered form

Question 35

Power

Answer 35

Time rate of doing work power is a scalar quantity Unit for Power in English "horsepower" IS is "WATT"

Question 36

Fundamental Dimension

Answer 36

Dimension that are independent of other dimensions Mass, Length, Time

Question 37

Lenth

Answer 37

Distance between two points

Question 38

Mass

Answer 38

Amount of Material in an object

Question 39

Time

Answer 39

Duration between two events

Question 40

Common English Standard Unit

Answer 40

Feet, Foot pound mass, Second.

Question 41

Common Si Unit

Answer 41

Meter, Kilogram, Second

Question 42

Derived Dimensions

Answer 42

A physical quantity which contains some combination of fundamental dimensions. Area, Volume, Speed, Velocity, Acceleration

Question 43

When expressing large number in English standard

Answer 43

Scientific method is used in multiples of 10

Question 44

When expressing large numbers in SI

Answer 44

Killo, Mega, Giga, Centi, milli,

Question 45

Newton's 1st Law of Motion

Answer 45

Every object persists in a stare of rest or uniform motion in a straight line unless acted upon by an external force.

Question 46

Newton's 2nd Law of Motion

Answer 46

The acceleration of an object is directly proportional to the net force acting on that object, in the direction of the net force, and inversely proportional to the mass of the object. F=MA

Question 47

Dimention

Answer 47

A physical quantity that is measurable