Physics 2

Question 1

Newton’s second law

Answer 1

The acceleration of an object is:

• directly proportional to the resultant force on an object
• inversely proportional to the mass of an object

Question 2

Force (N)=

Answer 2

Mass (kg)*acceleration (m/s2)

Question 3

The weight of an object is the force of gravity acting on the object
Weight (w)=

Answer 3

Mass (kg)*acceleration due to gravity (m/s2)

Question 4

Terminal velocity:

Answer 4

The maximum velocity that an object can travel at in a fluid

Question 5

Hooke’s law:

Answer 5

Force is directly proportional to extension provided the elastic limit is not reached

Question 6

Total stopping distance=

Answer 6

Thinking distance+braking distance

Question 7

Braking distance:

Answer 7

How far the car travels once the breaks have been applied

Question 8

Thinking distance

Answer 8

How far the car travels during your reaction time

Question 9

Thinking distance factors:

Answer 9

Distractions, age, alcohol consumption, drugs, tiredness

Question 10

Braking distance factors:

Answer 10

Tyre condition, driving surface, road conditions

Question 11

Both factors of braking and thinking distance:

Answer 11

Speed, heavy rain

Question 12

Momentum

Answer 12

A property of a moving object which depends on how much mass the object has and how fast it is moving

Question 13

P (kg m/s)=

Answer 13

m mass (kg)*v volume (m/s)

Question 14

Conservation of energy:

Answer 14

Energy cannot be created or destroyed, but can only be transferred from one energy store to another energy store

Question 15

Kinetic

Answer 15

Moving objects

Question 16

Chemical

Answer 16

Inside chemical bonds

Question 17

Thermal

Answer 17

Hot objects

Question 18

Gravitational potential:

Answer 18

Lifting something up

Question 19

Magnetic

Answer 19

Between two magnets

Question 20

Elastic potential

Answer 20

Stretched object

Question 21

Nuclear

Answer 21

Nuclear reactions

Question 22

Mechanical

Answer 22

When a force is involved

Question 23

Electrical

Answer 23

When electricity is involved

Question 24

Heating

Answer 24

When there is a change in temperature

Question 25

Radiation

Answer 25

By light or other EM waves

Question 26

Work done

Answer 26

Work is done when a force moves an object through a distance Work done is the same as the transfer of energy

Question 27

Calculating work done

Answer 27

``` Work is done when a force moves an object through a distance work done(J)W=F force(N)*S distance (m) ```

Question 28

Work done:

Answer 28

- Climbing a flight of stairs - swimming - running 100m - turning the pages of a book - a falling parachutist - playing a video game - lifting a weight - writing on a book

Question 29

No work done

Answer 29

- Watching TV - a spacecraft moving at a steady speed towards the moon - reading a book - driving at a steady speed on a motorway - talking - sleeping, sitting - holding a book

Question 30

Weight

Answer 30

The weight of an object is the force of gravity acting on the object