Motion

Question 1

What is displacement?

Answer 1

The distance covered in a straight line

Question 2

What is acceleration

Answer 2

A measure of how fast velocity is changing

Question 3

What is momentum

Answer 3

A combination of mass and velocity

Question 4

Name the calculation for speed

Answer 4

Distance(s)
—————
Time taken (s)

Question 5

Calculation for acceleration

Answer 5

Change in velocity (m/s)
———————————-
Time taken (s)

V= final
U= initial

A= v-u
————
Time

Question 6

What are forces

Answer 6

Vector qualities

Question 7

What is upthrust?

Answer 7

Pushing up

Question 8

What is weight

Answer 8

Pushing down

Question 9

What is Newton’s first law

Answer 9

Moving objects = same speed + direction until external force acts upon it

Question 10

What is mass?

Answer 10

Mass is the quality of matter there is in an object

Question 11

What is the acceleration of an object

Answer 11

A measure of how much it’s velocity changes in a certain time

Question 12

What is convection

Answer 12

A part of a fluid that is warmer than the rest rises and sets up a convection current

Question 13

What is GPE

Answer 13

An energy that is shores because of an objects position in a gravitational field

Question 14

How do you calculate GPE?

Answer 14

Change in gravitational potential energy(J) = mass(kg) X gravitational field strength(N/KG) X CHANGE IN VERTICAL HEIGHT

Question 15

How do you calculate KE?

Answer 15

0.5 x m x v squared

Question 16

What is hydroelectricity

Answer 16

It is generated by falling water in places where water can be trapped in high reservoirs

Question 17

What are bio fuels?

Answer 17

They are used in the same way as fossil fuels, but are natural and they are plant and animal waste?

Question 18

What are transverse waves?

Answer 18

They are waves on the surface of water

Question 19

What are sound waves of

Answer 19

They transfer energy, they are longitudinal waves

Question 20

What is wave frequency?

Answer 20

The number of waves passing a point each second

Question 21

What is wavelength

Answer 21

The distance from a point on one wave to a point in the same position on the next wave (m)

Question 22

What is the amplitude

Answer 22

The max distance from a point on the wave away from its rest position

Question 23

Calculate speed

Answer 23

(M/s) speed= distance (m)
——————
Time (s)

Question 24

What is refraction?

Answer 24

When it changes direction, that happens at the boundary between the two media

Question 25

Name all of the EM spectrum

Answer 25

``` Infared X-ray Gamma Visible light UV Microwaves Radio waves ```

Question 26

What is infared used for

Answer 26

Communication (computers, tv etc)

Question 27

Visible light?

Answer 27

Our eyes detect. Light bulbs emit it, cameras detect it

Question 28

Microwaves?

Answer 28

Communications + satiellite transmissions

Question 29

What is radiowaves

Answer 29

Transmitting radio broadcasts and TV programmes

Question 30

UV?

Answer 30

Fluorescent materials, bulbs, sunbed

Question 31

X-rays?

Answer 31

Detect medical treatments etc

Question 32

Gamma rays

Answer 32

Kill cancer cells in radiotherapy, or detect it

Question 33

Dangers, infared?

Answer 33

Too much heat = burns

Question 34

Dangers, gamma and x rays?

Answer 34

Mutations, kills cells

Question 35

Dangers, uv?

Answer 35

Skin cancer

Question 36

Microwaves + radiowaves dangers

Answer 36

Heat cells from inside

Question 37

What is slowing down

Answer 37

Deceleration

Question 38

Force equation

Answer 38

F= MV-MU —————- Time ``` M= mass U= initial velocity V= final velocity ```

Question 39

What is chemical energy?

Answer 39

Food, fuels, batteries

Question 40

What is kinetic energy

Answer 40

Moving objects

Question 41

What is thermal energy

Answer 41

Hot objects

Question 42

What is strain or elastic potential energy

Answer 42

Stretchy or squashed objects

Question 43

What is GPE?

Answer 43

High positions

Question 44

What is atomic or nuclear energy?

Answer 44

Energy stored in atoms

Question 45

What is a Sankey diagram

Answer 45

Shows the amount of energy transferred (J)

Question 46

What does dissipated mean

Answer 46

Spread out

Question 47

Why is to harder to pedal a bicycle if the chain needs oiling

Answer 47

Because friction between moving parts can be reduced by lubrication

Question 48

What is conduction

Answer 48

When vibrations are passed on between particles in a solid

Question 49

What is Newton’s thirds law

Answer 49

About the forces on two different objects when they interact with each other

Question 50

Name an example of Newton’s third law

Answer 50

When objects touch (eg sitting on a chair) Distance ( gravitational attraction between the earth and moon)

Question 51

When there is a pair of forces acting on two interactive objects, what is it called?

Answer 51

Action- reaction forces

Question 52

Describe the action- reaction forces when a ball bounces on the ground

Answer 52

Force from ball, force ground to ball

Question 53

What is momentum?

Answer 53

A measure of the tendency of an object to keep moving

Question 54

How is momentum calculated?

Answer 54

``` Momentum = mass x velocity P= momentum ``` P ——————— MXV

Question 55

What is conservation of momentum?

Answer 55

When moving objects collide the total momentum of both objects is the same before the collision as it is after.

Question 56

Equation for stopping distances

Answer 56

Stopping distance= thinking distance+ breaking distance

Question 57

What is reaction time?

Answer 57

The amount of time is takes to respond to a stimulus