SSA

Question 1

Define Speed

Answer 1

distance travelled per unit time

Question 2

Velocity

Answer 2

speed in a given direction

Question 2

𝑎𝑣𝑒𝑟𝑎𝑔𝑒 𝑠𝑝𝑒𝑒𝑑

Answer 2

Average speed = total distance over total time

Question 3

𝑎𝑐𝑐𝑒𝑙𝑒𝑟𝑎𝑡𝑖𝑜𝑛 formula

Answer 3

Acceleration = change in velocity over total time

Question 4

Acceleration

Answer 4

change in velocity per unit time

Question 5

(𝑓𝑖𝑛𝑎𝑙 𝑠𝑝𝑒𝑒𝑑)2

Answer 5

(𝑓𝑖𝑛𝑎𝑙 𝑠𝑝𝑒𝑒𝑑)2 = (𝑖𝑛𝑖𝑡𝑖𝑎𝑙 𝑠𝑝𝑒𝑒𝑑)2 + 𝑎𝑐𝑐𝑒𝑙𝑒𝑟𝑎𝑡𝑖𝑜𝑛 × 𝑑𝑖𝑠𝑡𝑎𝑛𝑐𝑒

Question 5

Distance is measured

Answer 5

Distance is measured in metres (m)

Question 6

speed and velocity are measured in

Answer 6

speed and velocity in metres per second (m/s)

Question 7

acceleration is measured in

Answer 7

acceleration in metres per second squared (m/s2).

Question 8

A vector has

Answer 8

magnitude and direction

Question 9

A scalar has

Answer 9

just a magnitude

Question 10

Friction

Answer 10

force between two surfaces which impedes motion and results in heating

Question 11

Newton’s first law

Answer 11

an object has a constant velocity unless acted on by a resultant force.

Question 12

Newton’s second law

Answer 12

𝑓𝑜𝑟𝑐𝑒 = 𝑚𝑎𝑠𝑠 × 𝑎𝑐𝑐𝑒𝑙𝑒𝑟𝑎𝑡𝑖𝑜𝑛

Question 13

Newton’s third law

Answer 13

every action force has an equal and opposite reaction force

Question 13

𝑤𝑒𝑖𝑔ℎ𝑡 =

Answer 13

𝑤𝑒𝑖𝑔ℎ𝑡 = 𝑚𝑎𝑠𝑠 × 𝑔𝑟𝑎𝑣𝑖𝑡𝑎𝑡𝑖𝑜𝑛𝑎𝑙 𝑓𝑖𝑒𝑙𝑑 𝑠𝑡𝑟𝑒𝑛𝑔𝑡ℎ

Question 14

Mass

Answer 14

a measure of how much matter is in an object,

Question 15

thinking distance.

Answer 15

The distance travelled in the time between the driving realising he needs to brake and actually pressing the brakes

Question 16

braking distance

Answer 16

The distance travelled in the time between pressing the brakes and the vehicle coming to a stop

Question 17

CURRENT IS

Answer 17

The rate of flow of charge at a point in the circuit.

Question 17

stopping distance

Answer 17

the sum of the thinking distance and braking distance.

Question 18

Current (I) is measured in

Answer 18

amperes

Question 19

The current is given

Answer 19

I=Q/t, where Q is measured in coulombs (C) and t in seconds (s).

Question 20

current In solutions can be

Answer 20

the flow of ions.

Question 21

In metals, current is due to

Answer 21

flow of electrons

Question 22

Conventional current is

Answer 22

the rate of flow of positive charge

Question 23

Current is conserved at a

Answer 23

junction in a circuit because charge is always conserved.

Question 24

Current is measured with an

Answer 24

ammeter connected in series with the component.

Question 25

Potential difference V is measured in

Answer 25

volts

Question 26

The potential difference is given b

Answer 26

V=E/Q.

Question 27

The resistance of a component is measured in

Answer 27

ohms (Ω)

Question 27

Volts are measured with a

Answer 27

voltmeter placed in parallel across the component.

Question 28

Series

Answer 28

Components are connected end to end in one loop The same current flows through every component

Question 29

What did waves transfer and not transfer

Answer 29

energy and information without transferring matter

Question 30

Amplitude

Answer 30

the distance from the equilibrium position to the maximum displacement

Question 30

Transverse waves

Answer 30

Have peaks and troughs Vibrations are at right angles to the direction of travel An example is light

Question 31

Longitudinal waves

Answer 31

Consists of compressions (particles pushed together) and rarefactions (particles moved apart) Vibrations are in the same direction as the direction of travel An example is sound

Question 32

Wavefront

Answer 32

a line joining points on a wave at the same point in their wave cycle at a given time

Question 33

Wavelength

Answer 33

the distance between a point on one wave and the same point on the next wave

Question 33

Electrical heat production

Answer 33

when a current passes through a lamp and it emits light and heat.

Question 33

Frequency

Answer 33

the number of waves that pass a single point per second

Question 34

Time period

Answer 34

the time taken for one complete wave to pass a fixed point

Question 35

Mechanical energy production

Answer 35

when gravity accelerates an object and gives it kinetic energy.

Question 36

How does heating happen

Answer 36

when a fire is used to heat up an object.

Question 37

By radiation

Answer 37

when vibrations cause waves to travel through the air as sound, or an object emits electromagnetic radiation

Question 38

efficiency

Answer 38

efficiency useful energy output ----------------------------- x 100 total energy output

Question 39

Work is done when

Answer 39

a force moves something through a distance (whenever energy changes forms). The work done is equal to the energy transferred.

Question 40

work done =

Answer 40

work done = force × distance

Question 41

The conservation of energy produces a

Answer 41

link between gravitational potential energy, kinetic energy and work

Question 42

Power is

Answer 42

the rate at which energy is transferred or the rate at which work is done

Question 43

power=

Answer 43

power= work done --------------- time taken