physics

Question 1

what do vectors have

Answer 1

vectors have magnitude and direction

Question 2

vector quantities

Answer 2

force velocity displacement weight acceleration momentum

Question 3

formula for distance travelled

Answer 3

average speed x time (s)

Question 4

what do scalars have

Answer 4

scalars have magnitude but no direction

Question 5

scalar quanataties

Answer 5

speed distance mass energy temp time

Question 6

formula for acceleration

Answer 6

acceleration = final velocity - initial velocity div time

Question 7

what is the formula for constant acceleration

Answer 7

final velocity squared - initial velocity squared = 2 x accel x distance

Question 8

formula for resultant force

Answer 8

resultant force=mass x acceleration

Question 9

newtons first law

Answer 9

if the resultant force on a stationary object is zero, the object will remain stationary. if the resultant force on a moving object is zero, it’ll just carry on moving at the same velocity..
in simple a resultant force is needed to make something start moving, speed up or slow down

Question 10

formula for weight

Answer 10

mass x gravitational field strength

Question 11

newtons third law

Answer 11

when two objects interact the forces they exert on each other are equal and opposite

Question 12

formula for momentum

Answer 12

p=m x v momentum = mass x velocity

Question 13

formula of force

Answer 13

change in momentum div time

Question 14

all energy stores

Answer 14

kinetic, thermal, chemical, GPE, EP, electrostatic, magnetic and nuclear

Question 15

formula for GPE

Answer 15

mass x grav feild strength x change in vertical height

Question 16

formula of kinetic energy

Answer 16

0.5 x mass x speed squared

Question 17

what is conservation of energy

Answer 17

energy can be stored, transferred and dissipated but never created or destroyed

Question 18

all energy transfer with definition

Answer 18

mechanically- a force acting on a object e.g. pushing, stretching
electrically- a charge doing work against resistance e.g. charges moving around the circuit
by heating- energy transferred from a hotter object to a colder object
by radiation- energy transferred by waves

Question 19

formula for efficiency (answer will be given as a decimal for percentage times by 100)

Answer 19

useful energy transferred by device divide total energy supplied to device

Question 20

measuring waves practical in watere

Answer 20

1st using a signal generator attached to the dipper of the tank you can create water waves at a set frequency
2nd dim the lights then turn onj the strobe light you will seee a wave pattern made by shadows underneath
3rd change the frequency of the strobe light until the wave pattern ‘freezes’
4th the distance between each shadow line is equal to one wavelength then use wave speed = freq x wavelength

Question 21

2 formulas for wave speed

Answer 21

v= distance over time v= freq x wavelength

Question 22

refraction practical

Answer 22

1st place a transparent block on paper then trace around it and use ray box to shine light into it
2nd trace the incident ray and the emergent ray. remove the blovk and join up the two lines.
3rd draw the normal at the point where the ray entered the block. use protractor to measure the angle.
4th do the same on the other line
6th repeat this three times for accurate results

Question 23

All em waves from highest freq to lowest freq

Answer 23

gamme rays, x-rays, uv, visible light, if, microwaves, radiowaves

Question 24

How do we show efficacy

Answer 24

Diagrams

Question 25

What does the smaller arrow represent on a sankey diagram

Answer 25

Wasted energy

Question 26

What reduces energy that is transferred by friction

Answer 26

Lubrication

Question 27

What reduces the rate of energy transferred by heating?

Answer 27

Insulation

Question 28

What energy source will run out

Answer 28

Non- renewable energy sources

Question 29

What are non renewable energy sources made from?

Answer 29

Fossil fuels and nuclear fuel

Question 30

What energy source will never run out

Answer 30

Renewable energy sources

Question 31

What are the renewable energy sources

Answer 31

Bio fuels, wind, the sun (solar), hydroelectricity, tides.

Question 32

What are bio fuels made from

Answer 32

Plants and waste

Question 33

What does the term “reaction time” mean”

Answer 33

The interval between stimulation and response

Question 34

all energy stores

Answer 34

kinetic, thermal, chemical, GPE, EP, magnetic, nuclear, electrostatic

Question 35

formula for work done

Answer 35

force x distance moved in the direction of the force

Question 36

formula for power

Answer 36

work done divide time taken

Question 37

formula for gpe

Answer 37

mass x height x gravitational field strength (10)