Physics

Question 1

Equation for weight

Answer 1

W=mg

Question 2

Equation for force

Answer 2

F=Ke

Question 3

Equation for work done

Answer 3

W=Fs

Question 4

Equation for power

Answer 4

P=E/t

Question 5

Other equation for power

Answer 5

P=W/t

Question 6

Equation for gravitational potential energy

Answer 6

Ep = mgh

Question 7

Equation for Kinetic energy

Answer 7

Ek= m(vsquared)/2

Question 8

Equation for Elastic potential energy

Answer 8

Ee= k(e squared)/2

Question 9

Equation for efficiency

Answer 9

efficiency = useful output energy transfer/ total input energy transfer

Question 10

Other Equation for efficiency

Answer 10

Useful power output/ total power input

Question 11

What is efficiency

Answer 11

An indication of how much of the energy supplied to a device is transferred as a useful output

Question 12

What do electrons have a charge of

Answer 12

-1.6 * 10 to the -19 coloumbs

Question 13

What do protons have a charge of

Answer 13

+1.6 * 10 to the -19 coloumbs

Question 14

What is current determined by

Answer 14

The potential difference across the components and the resistance of the components

Question 15

What is the equation for resistance

Answer 15

Resistance = potential difference/ current

Question 16

What does an ammeter measure

Answer 16

How many coulombs of charge pass a point per second - the current

Question 17

What does a voltmeter measure

Answer 17

The difference in energy of two points in a circuit - the potential difference, how much energy a coloumb loses or gains

Question 18

What does the potential measure?

Answer 18

It measures the amount of energy each coloumb of charge has at a particular part in a circuit. We colour code the diagram to show the different energies. How much energy each coloumb of charge has in each part of the cell

Question 19

Equation for speed

Answer 19

S=d/t

Question 20

Equation for velocity

Answer 20

Displacement/ time - v=s/t

Question 21

Equation for acceleration

Answer 21

a= change in velocity/ time

Question 22

Other Equation for acceleration

Answer 22

(v-u)/t

Question 23

Average walking speed

Answer 23

1.5m/s

Question 24

Average running or jogging speed

Answer 24

3m/s

Question 25

Average Cycling speed

Answer 25

6m/s

Question 26

What is a force

Answer 26

A push or pull caused by an object interacting with another

Question 27

What are the two non contact forces

Answer 27

Electromagnetic and weight

Question 28

What is upthrust

Answer 28

Pushing boat etc upwards in water

Question 29

What is normal contact force

Answer 29

A force perpendicular to the surface it’s touching

Question 30

What does lift do

Answer 30

Lifts plane in air, pushes it up

Question 31

Thrust/ drive what does it do

Answer 31

Kelps plane gojng in air , forwards

Question 32

Drag, air resistance what does it do

Answer 32

Drags plane backwards, slows it down

Question 33

Tension what is it

Answer 33

Being pulled on a string

Question 34

what is the difference between mass and weight?

Answer 34

mass is how matter makes up an object, whereas weight is the force of gravity pulling down on an object

Question 35

what is hooke's law

Answer 35

the extension of a spring is directly proportional to the force applied provided the limit of proportionality is not exceeded!!!

Question 36

what is the other euqation of force (hint acceleration)

Answer 36

F=ma

Question 37

equation of specific heat capacity

Answer 37

E = mc(change in)t

Question 38

euqation of specific latent heat

Answer 38

E= ml

Question 39

what two things happen if an object is elastically deformed?

Answer 39

when the force is removed it returns to its initial shape and length/size

Question 40

what is it called if an object does not return back to its original shape and length when the force is removed?

Answer 40

inelastic deformation

Question 41

what are the 8 energy stores?

Answer 41

gravitational, nuclear, kinetic, thermal, elastic, electromagnetic, chemical, vibration

Question 42

what 4 different pathways can energy move between

Answer 42

mechanical working, electrical working, heating by particles and heating by radiation

Question 43

what are examples of the 4 energy pathways? xx

Answer 43

mechanical - force, electrical -circuit, heating by particles - conduction and convection, heating by radiation - light and infrared

Question 44

what is the definition of work done?

Answer 44

a measure of how much energy is trasnferred by mechanical working

Question 45

equation for v squared

Answer 45

v squared = u squared + 2as

Question 46

what is the definition of power???

Answer 46

the rate at which energy is transferred

Question 47

if an object is dropped from a certain height to the ground what store does the energy go from to to?

Answer 47

gravitational potential store ---> kinetic store

Question 48

if an object is dropped from a certain height to the ground how woukd you work out the velocity og the coin, given the initial energy from gpe was 9.31J

Answer 48

input it into the equation Ek = 1/2 mvsquared, and work out that it is travelling at 86m/s

Question 49

if we ignore ? resistance, the energy of one ? is the same as the one it is ? to

Answer 49

air, store, transferred

Question 50

what are the two types of electric charge, and what happens when the two types are very close to each other?

Answer 50

positive and negative, and they attract and stick together almost

Question 51

when ? insulators are rubbed together, ? charged electrons move from one ? to the other : eg - a rod and a cloth - the rod gains a positive charge as the negatively charged ? have moved from the ? to the cloth, giving the rod less electrons and therefore more ? so more positively charged protons, so it is ? charged

Answer 51

two, negatively, insulator, electrons, rod, protons, positively

Question 52

the ? the potential difference the higher the current, they are ? proportional

Answer 52

higher, directly

Question 53

the higher the resistance the lower the ?, they are ? proportional

Answer 53

current, indirectly

Question 54

equation of resistance

Answer 54

potential difference (v)/ current (A)

Question 55

if an ammeter measured 6A how many coulombs of charge pass a point per second?

Answer 55

6 coloumbs of charge per second

Question 56

what is the potential difference?

Answer 56

how much energy a coulomb loses or gains, the difference in energy of two points on a circuit

Question 57

if one point has 3J of energy and one has 1.5J - how many volts does each point have and what is the potential difference?

Answer 57

they have 3V and 1.5V respectively, and the potential difference is the difference between the two so 3-1.5 so 1.5V

Question 58

having more bulbs in a series circuit ? the current, but in a parallel having more bulbs ? the current since the total ? decreases and it gives the current more ? to and from the cell

Answer 58

decreases, increases, resistance, resistance, paths

Question 59

what is resistance?

Answer 59

a measure of the opposition to the current flow in an electrical current

Question 60

by adding an extra wire around a bulb in a series circuit the ammeter reading ? so the ? also increased, but the voltmeter reading ? since there’s no ? flowing through the bulb so very ? potential difference

Answer 60

increases, current, decreases, current, low