Physics (Motion)

Question 1

Distance

Answer 1

Length between two points. Unit is meters (m).

Question 2

Speed

Answer 2

Distance travelled divided by the time taken (m/s).

Question 3

Time

Answer 3

How long it takes to do something (s).

Question 4

Distance Time Graph

Answer 4

Graph drawn using time on x axis and distance on y axis. The slope gives the speed.

Question 5

Magnets

Answer 5

Pieces of metal that attract other substances

Question 6

Magnetic Materials

Answer 6

Materials magnet attract. For example iron, steel, cobalt and nickel, as well as other magnets.

Question 7

Alloy

Answer 7

A mixture of two metals. Steel contains iron and cobalt.

Question 8

Poles

Answer 8

Magnetic force of attraction is strongest at both ends of a magnet. North and South Pole. Like poles repel each other, unlike poles attract each other.

Question 9

Current Electricity

Answer 9

The steady flow of charge through wires and circuits.

Question 10

Static Electricity

Answer 10

When two objects come into contact, electrons can transfer between them. When this happens, both objects become charged with static electricity.

Question 11

Charged Particles

Answer 11

Particles that have gained or lost electrons.

Question 12

Conductors

Answer 12

A substance that allows energy, such as heat or electricity, to pass through easily.

Question 13

Insulators

Answer 13

A substance that does not allow energy, such as heat or electricity, to through it easily.

Question 14

Negative

Answer 14

Electrons have a negative charge. If an object gains electrons, it becomes negatively charged.

Question 15

Positive

Answer 15

An object that has lost electrons takes on a positive charge.

Question 16

Components

Answer 16

The objects in an electrical circuit e.g. bulb, speaker.

Question 17

Circuit diagram

Answer 17

A drawing using symbols to represent how a circuit is set up

Question 18

Current

Answer 18

The rate of flow of charge per second. Symbol is (I). Measured using an ammeter.

Question 19

Ammeter

Answer 19

Equipment used to measure current (I).

Question 20

Potential Difference

Answer 20

When there is a point of high electrical energy and a point of low electrical energy in a circuit, there is a difference in electrical potential energy between these points. It is called potential difference.

Question 21

Voltage

Answer 21

Another word for potential difference. Measured in Volts (V) using a voltmeter.

Question 22

Resistance

Answer 22

A measure of how difficult it is for an electric current to pass through a substance.Unit is the Ohm. Measured using an ohmmeter.

Question 23

Scalar

Answer 23

A measurement that has size (magnitude) only. They do not have direction associated with them. E.g. distance, speed, time.

Question 24

Vector

Answer 24

A quantity that has magnitude and direction associated with them. e.g. displacement, velocity.

Question 25

Displacement

Answer 25

Is the distance an object travels in a certain direction e.g 50 meters north.

Question 26

Velocity

Answer 26

Is the speed of an object in a given direction. E.g 10 m/s south.

Question 27

Acceleration

Answer 27

When speed changes over time, it is called acceleration.
Acceleration = change in speed time taken
Unit = m/s/s or metre per second squared
Acceleration = Change in velocity time taken