Motion, Forces and Conservation of Energy

Question 1

Name 3 Vector Quantities

Answer 1

Force
Velocity
Displacement
Weight
Acceleration
Momentum

Question 2

Name 3 Scalar Quantities

Answer 2

Speed
Distance
Mass
Energy
Temperature 
Time

Question 3

What is Distance

Answer 3

How far an object has moved (scalar Quantities)

Question 4

What do vector quantities have

Answer 4

Magnitude (size)

Question 5

What do Scalar Quantities have

Answer 5

Only have magnitude (size) and no direction.

Question 6

What does displacement do

Answer 6

It measures the distance and direction in a straight line from an objects starting point to its finishing point

Question 7

What is Speed?

Answer 7

How fast you are going with no regard of direction

Question 8

What is Velocity

Answer 8

Speed in a given direction

Question 9

What is Acceleration?

Answer 9

How quickly your are speeding up

Question 10

What is uniform acceleration?

Answer 10

Constant acceleration

Question 11

What is need to change motion

Answer 11

A force

Question 12

What is Newton’s first law?

Answer 12

If the resultant force on a stationary object is zero, the object will remain stationary. If the resultant force on a moving object it zero, it’ll just carry on moving at the same velocity.

Question 13

What is acceleration inversely proportional to

Answer 13

The mass of the object

Question 14

Newton’s second law:

Answer 14

Force = mass x acceleration

Question 15

What is mass?

Answer 15

Amount of stuff in an object

Question 16

Is mass a Scalar or Vector quantity ?

Answer 16

Scalar

Question 17

What is weight?

Answer 17

Force acting on an object due to gravity

Question 18

What is the gravitational field strength on earth

Answer 18

10 N/Kg

Question 19

What is centripetal force?

Answer 19

The force that keeps something moving in a circle

Question 20

How does circular motion work?

Answer 20

The object is constantly changing direction 
It’s accelerating 
Must be a resultant force acting on it 
Acts towards centre of the circle 
Centripetal force

Question 21

What is Inertia

Answer 21

The tendency for motion to remain unchanged

Question 22

What does inertial mass measure?

Answer 22

How difficult is it to change the velocity of an object

Question 23

How is inertial mass found?

Answer 23

Using Newton’s second law

F=ma

Question 24

Newton’s third law:

Answer 24

When two objects interact, the forces they exert in each other are equal and opposite

Question 25

What is momentum

Answer 25

Mass x velocity | P=mv

Question 26

Is momentum a Scalar or Vector quantity?

Answer 26

Vector

Question 27

What causes a change in momentum

Answer 27

When a resultant force acts on an object for a certain amount of time

Question 28

What is force

Answer 28

Change in momentum ➗ time

Question 29

The faster the change in momentum.......

Answer 29

The bigger the force

Question 30

Stopping distance

Answer 30

Thinking distance + braking distance

Question 31

What can reaction time be increased by?

Answer 31

Tiredness Alcohol Drugs Distractions

Question 32

Energy in the cars kinetic energy store =

Answer 32

Work done by brakes | Braking force x braking distance

Question 33

Kinetic energy

Answer 33

Anything moving has energy in its kinetic energy store

Question 34

Thermal

Answer 34

Any object —

Question 35

Chemical

Answer 35

Anything that can release energy by a chemical reaction

Question 36

Gravitational potential

Answer 36

Anything in a gravitational field

Question 37

Elastic potential

Answer 37

Anything stretched

Question 38

Electrostatic

Answer 38

Two charges that attract or repel each other

Question 39

Magnetic

Answer 39

Two magnets that attract or repel each other

Question 40

Nuclear

Answer 40

Atomic nuclei release energy from this store in nuclear reactions

Question 41

KE=

Answer 41

1/2 x m x v^2

Question 42

What does conservation of energy mean

Answer 42

Energy is never created or destroyed

Question 43

mechanically transferred energy

Answer 43

A force is acting on an object

Question 44

Electrically transferred energy

Answer 44

a charge doing work against resistance

Question 45

By heating transferred energy

Answer 45

Energy transferred from a hotter object to a colder object

Question 46

By radiation transferred energy

Answer 46

Energy transferred by waves

Question 47

Total energy input =

Answer 47

Useful energy output + waste

Question 48

Efficiency =

Answer 48

Useful energy transferred by device / total energy supplied to device

Question 49

What does lubrication do ?

Answer 49

Reduces energy transferred by friction

Question 50

What does dissipated mean?

Answer 50

Energy is spread out

Question 51

What does insulation reduce ?

Answer 51

The rate of energy transfer by heating

Question 52

What is non-renewable energy?

Answer 52

Energy resources that will run out one day Fossil fuels Nuclear fuel

Question 53

What are the three main fossil fuels?

Answer 53

Coal Oil Gas

Question 54

Are fossil fuels cheap or expensive to extract

Answer 54

Cheap

Question 55

How do fossil fuels create environmental problems?

Answer 55

``` They release co2 into the atmosphere Adds to the greenhouse gases Contributes to global warming Releases sulfur dioxide which causes acid rain. Oil spillage ```

Question 56

Name 5 renewable energy resources

Answer 56

``` Bio-fuels Wind Sun Hydro-electricity Tides ```

Question 57

How are biofuels made

Answer 57

From plants and waste