Physics

Question 1

Define static

Answer 1

When a body is at rest or all the forces are in equilibrium it is static

Question 2

Define centre of gravity

Answer 2

Centre of gravity is the balance point of an aircraft or object

Question 3

What is the equation for moments

Answer 3

Moment is force x distance

Question 4

For an aicraft to return to equilibrium what moments have to be equal

Answer 4

The clockwise and anti clockwise moments

Question 5

Scalar quantiles have only got

Answer 5

A magnitude

Question 6

Vector quantities have

Answer 6

A magnitude and direction

Question 7

What is the formula for stress

Answer 7

Stress is force divided by area

Question 8

What is the unit of stress

Answer 8

N/m squared

Question 9

What is the equation for strain

Answer 9

Strain is is the change in length divided by the original

Question 10

What is the equation for elasticity

Answer 10

stress divide by the strain

Question 11

What is hookes law hint (springs )

Answer 11

is the spring constant times the exstention

Question 12

What parts does the stress strain curve have

Answer 12

Proportional limit
Elastic limit
Lower yeild point
Breaking point
Fracture point

Question 13

The density equation is

Answer 13

Mass divide by volume Kgm cubed

Question 14

What is the pressure equation

Answer 14

Force divide by area

Question 15

What is pascals principle

Answer 15

It says that when force is applied to an enclosed fluid they transmit all pressure to the walls of the container equally

Question 16

What is absolute pressure

Answer 16

Gauge pressure plus the ambient pressure usually 15

Question 17

What is the effect of depth

Answer 17

It gets greater the further you go down due to atmospheric pressure and the water above you

Question 18

How to calculate load

Answer 18

Pressure x area

Question 19

What is Archimedes principle

Answer 19

It is the law of bouyncy the volume of displaced fluid is equivalent the volume of the object immersed

Question 20

What is relative density

Answer 20

Weight of solid divide by the upthrust

Upthrust cna be calculated by the weight of the object in the air - the weight of the object in water

Question 21

What is atmospheric pressure

Answer 21

It is effectively the column of air sitting above you stretching to the atmosphere it is about 101.3kn m cubed

Question 22

How to claulate the height of a mecurcy Colum

Answer 22

It is pressure divide by density x gravity

Question 23

How to calculate speed

Answer 23

Speed is distance traveled divide by time taken

Question 24

Acceleration

Answer 24

Change of velocity divide by time

Question 25

Is velocity a vector true or false

Answer 25

True

Question 26

What is the equation of linear motion

Answer 26

The initial velocity plus change of velocity x time or v=u+at

Question 27

What is Newton’s first law

Answer 27

An object at rest tends to remain at rest and an object in motion tends to remain in motion

Question 28

What is Newton’s second law

Answer 28

When a force acts upon a body the momentum of the body is changed the rate of change is proportional to the applied force

Question 29

What is Newton’s third law

Answer 29

Every action has an equal and oposite reaction

Question 30

What is the equation for momentum

Answer 30

Mass x velocity

Question 31

How to calculate angular displacement

Answer 31

Arc length divide by radius of the circle

Question 32

How to calculate angular velocity hint (rads )

Answer 32

The angular displacement (rads) divide by time

Question 33

Centripetal force acts towards the scentre true or false

Answer 33

True

Question 34

Centrifugal force acts outwards true or false

Answer 34

True

Question 35

What is periodic motion

Answer 35

It is a motion that repeats itself after an equal period of time They at and sup of the amplitude the height of the wave The time period peak to peak And the displacement the lowest peak to the biggest

Question 36

What is resonance

Answer 36

It is the natural frequency of an object if two frequency math they’ll resonate an increase their amplitude

Question 37

How to calculate mechanical advantage

Answer 37

Force x distance load / effort

Question 38

What is a first class lever

Answer 38

It’s like a sea saw

Question 39

What is a second class lever

Answer 39

It’s where is on the handle and you balancing it on the fulcrum Effort load fulcrum

Question 40

What is a third class lever

Answer 40

It’s where your hands in the middle closest to the fulcrum with the weight on the other side Load effort fulcrum

Question 41

How to calculate the mechanical advantage of a screw

Answer 41

Circumference divide by pitch

Question 42

What is the velocity ratio

Answer 42

It is the distance moved by effort divide by the distance moved by load Or Teeth on driven divide by teeth on drive

Question 43

What is weight

Answer 43

Mass x gravity

Question 44

What is the equation of boyles law

Answer 44

P1 x v1

Question 45

What is the Doppler shift equation

Answer 45

Reciver frequency - transmitter

Question 46

What is the atomic mass

Answer 46

Protons and neutrons

Question 47

What do the atomic number

Answer 47

Protons

Question 48

What is acceleration

Answer 48

V2 -V1 ———— T