Energy

Question 1

Def of kinetic energy

Answer 1

All moving things eg. a roallarcoaster

Question 2

Def of thermal energy

Answer 2

The energy of a substance or an object store because of its temp
Eg. Hot chocolate

Question 3

Def of elastic potential energy

Answer 3

The energy stored in a springy object when you stretch or squash it
Eg. A hairband

Question 4

Def of gravitational potential energy

Answer 4

The energy stored in an object because of it’s position above the ground
Eg. Bungee jumping

Question 5

Is energy ever used up?

Answer 5

NO, it is just transferred between objects

Question 6

Def of mechanical working

Answer 6

-Includes soundwaves
-involves a force
-surfaces being in contact

Question 7

Def of electrical working

Answer 7

-via current(through wires)

Question 8

Def of heating by particles

Answer 8

-heat moving from one place to another via conduction and convention

Question 9

Def of heating by radiation

Answer 9

-heat radiation
-any electromagnetic waves (light waves)

Question 10

What is the principle of conservation of energy

Answer 10

ENERGY CANNOT BE CREATED OF DESTROYED only transferred from one store to another

Question 11

What stores of energy does a kettle boiling go through

Answer 11

Electrical working>thermal/internal energy store of the heating element>heating by particles>thermal/internal energy store of the water

Question 12

What stores of energy does a ball thrown in the air go through

Answer 12

Chemical energy store of the arm muscles>mechanical working>kinetic energy store of the arm and the ball>mechanical working> gravitational potential>gravitational potential energy store of the ball

Question 13

What stores of energy does a car braking go through

Answer 13

Gravitational potential energy store of the ball>mechanical working>kinetic energy store of the ball

Question 14

Energy transferred = ?

Answer 14

Work done

Question 15

W= ?

Answer 15

WORK measured in J, joules

Question 16

F=?

Answer 16

FORCE measured in N, newtons

Question 17

S=?

Answer 17

DISTANCE

Question 18

How do u find W?

Answer 18

W=fxs

Question 19

How do you dine F?

Answer 19

F=w/s

Question 20

How do you find s?

Answer 20

S=w/f

Question 21

Find work (J) fxs
F= 50
S= 5meters

Answer 21

5meters x 50 = 250 J

Question 22

Find work (J) fxs
F= 3
S= 5meters

Answer 22

3 x 5 = 15J

Question 23

Find work (J) fxs
F= 20
S= 40meters

Answer 23

20 x 40 = 800J

Question 24

Find force (N) w/s
W= 20
S=5

Answer 24

20/5=4N

Question 25

Find force (N) w/s W= 300 S=6

Answer 25

300/6=50N

Question 26

Find force (N) w/s W= 1000 S=200

Answer 26

1000/200=5N

Question 27

Find distance (M) w/f W=300 F=6

Answer 27

300/6=50M

Question 28

Find distance (M) w/f W=2000 F=80

Answer 28

2000/80=25M

Question 29

Mass def

Answer 29

Mass is a measure of the amount of physical material an object is comprised of with the unit KG

Question 30

Weight def

Answer 30

Weight is a measure of the force from gravity acting on a mass with the unit N

Question 31

W=?

Answer 31

Weight N

Question 32

g=?

Answer 32

Gravitational field strength N/KG

Question 33

m=?

Answer 33

Mass KG

Question 34

Find W mxg m=20 g=9.8

Answer 34

20x3=60N

Question 35

Find W mxg m=600 g=9.8

Answer 35

600x10=6000N

Question 36

Find m w/g W=500 g=9.8

Answer 36

500/50=10KG

Question 37

Find m w/g W=6000 g=9.8

Answer 37

6000/300=20KG

Question 38

Find g w/m W=40 s=2

Answer 38

40/2=30N/KG

Question 39

Find g w/m W=1000 s=250

Answer 39

1000/250=4N/KG

Question 40

Def of gravitational potential energy

Answer 40

Gravitational potential energy (GPE) is the energy stored by an object by its position above the ground

Question 41

Eg=?

Answer 41

Gravitational potential energy J

Question 42

m=?

Answer 42

Mass KG

Question 43

g=?

Answer 43

GPE N

Question 44

h=?

Answer 44

Height M

Question 45

Find m eg/gxh Eg=