Physics EOY

Question 1

vector quantities (VADFW)

Answer 1

velocity, acceleration, displacement, force, weight

Question 2

speed in a DT graph

Answer 2

gradient

Question 3

distance travelled in a ST graph

Answer 3

area under graph

Question 4

acceleration in a ST graph

Answer 4

gradient

Question 5

Define distance

Answer 5

length of path travelled by an object from one position to another position

Question 6

Define Displacement

Answer 6

distance travelled by an object btw the initial and final position in a straight line in a stated direction

Question 7

Define speed

Answer 7

change of distance per unit time

Question 8

Define velocity

Answer 8

change of displacement per unit time

Question 9

Define acceleration

Answer 9

rate of velocity change

Question 10

SI unit for acceleration

Answer 10

10m/s^2

Question 11

find distance with acceleration

Answer 11

1/2 x acc x time

Question 12

N1L

Answer 12

• Law of inertia
• an object will remain at rest or uniform motion unless an unbalanced force is applied

Question 13

what is a force

Answer 13

a push/pull

Question 14

N2L

Answer 14

acceleration of an object is directly proportional to Fr and inversely proportional to mass

Question 15

N3L

Answer 15

for every action there is an equal and opp reaction

Question 16

Define inertia

Answer 16

tendency for a body to continue with its state of rest or motion
- the heavier the object, the larger the inertia

Question 17

weight

Answer 17

mass x gravity

Question 18

density

Answer 18

mass/volume

Question 19

tension

Answer 19

mg + ma (weight + resultant force)

Question 20

kg to newton

Answer 20

1kg -10N

Question 21

efficiency

Answer 21

(useful energy/total energy) x 100%

Question 22

power

Answer 22

energy/ time or work done/time

Question 23

gravitational potential energy

Answer 23

mass x height x 10

Question 24

kinetic energy

Answer 24

1/2 x m x v^2

Question 25

Law of COE

Answer 25

energy cannot be created or destroyed, only transferred from one body to another

Question 26

forward thrust

Answer 26

acceleration

Question 27

kW to W/kJ to J

Answer 27

1kW/kJ=1000W/J

Question 28

density formula

Answer 28

density = mass/volume

Question 29

acceleration formula

Answer 29

change in dist/change in time

Question 30

moment formula

Answer 30

force x distance

Question 31

principle of moments

Answer 31

sum of CW = sum of ACW

Question 32

pressure formula

Answer 32

force/area