Sci - Physics

Question 1

Motion

Answer 1

Objects move from one point of space to another over time

Question 2

Stationary

Answer 2

Objects remain at the same point of space over a period of time

Question 3

Speed

Answer 3

A measure of the distance travelled over the time taken

Question 4

Distance

Answer 4

Used to describe how far an object has travelled from the starting point

Question 5

Time

Answer 5

Used to describe how long a journey has taken

Question 6

Formula for Speed

Answer 6

V = d/t

Question 7

Formula for Acceleration

Answer 7

a = v/t

Question 8

Acceleration

Answer 8

Change of speed over time

Question 9

How Acceleration occurs

Answer 9

1. If an objects speed changes per second
2. Unbalanced force is applied to an object
3. If an object changes direction

Question 10

Friction

Answer 10

The force which always opposes the direction

Question 11

Drag

Answer 11

Friction that occurs in a fluid or gas

Question 12

Useful instances of Friction

Answer 12

Walking - Grip
Cycling - Grip
Driving - Grip + Brakes

Question 13

Air Resistance

Answer 13

When an object falls through air this type of friction occurs

Question 14

Pressure

Answer 14

How much force is put onto a particular area

Question 15

Forumula for pressure

Answer 15

P = F/A

Question 16

Conservation of Energy

Answer 16

Energy cannot be created or destroyed only transformed or transferred

Question 17

Energy

Answer 17

The ability to do work

Question 18

Types of Potential energy

Answer 18

• Gravitational potential energy
• Elastic potential energy
• Chemical potential energy

Question 19

Types of Kinetic energy

Answer 19

• Kinetic Energy
• Heat, sound, radiation, light energy

Question 20

Potential energy equation

Answer 20

Ep = mgh

Question 21

Kinetic energy equation

Answer 21

Ek = 1/2mv2

Question 22

Newtons first law of Motion

Answer 22

An object cannot start, stop, or change direction all by itself

Question 23

Newtons second law of Motion

Answer 23

The force applied on an object is equal to the product of its mass and accelertation

Question 24

Newtons third law of Motion

Answer 24

For every action, there is an equal and opposite reaction

Question 25

Force

Answer 25

A force is a push or a Pull

Question 26

Force equation

Answer 26

F = ma

Question 27

Work

Answer 27

The transformation of energy (Ep = W)

Question 28

Work equation

Answer 28

W = Fd

Question 29

Power

Answer 29

The work done over time

Question 30

Power equation (work)

Answer 30

P = W/t

Question 31

Vector quantities

Answer 31

- displacement - velocity - acceleration - force - weight - momentum

Question 32

Work done

Answer 32

When a force causes an object to move a distance in the direction of force

Question 33

Density equation

Answer 33

d = m/V

Question 34

Current

Answer 34

Flow of electrically charged particles

Question 35

Resistance

Answer 35

The opposition the charged particles encounter while flowing

Question 36

Voltage

Answer 36

The difference in electric potential energy between 2 places

Question 37

Series circuit

Answer 37

One single path for the current to flow, connecting the battery to all the components

Question 38

Parallel

Answer 38

Two or more paths available for the current to flow

Question 39

Electrical power

Answer 39

The amount of energy transformed by a component in a circuit or by the battery per second

Question 40

Power equation (current)

Answer 40

P=IV

Question 41

Power-Energy equation

Answer 41

P = E/t

Question 42

Increase power supplied

Answer 42

Light bulbs burn brighter so more energy transformed per second. This well either drain the batteries faster or cost more

Question 43

Benefits of parallel

Answer 43

If one component fails the others continue to operate as there are more pathways for electricity to flow

Question 44

Factors that affect resistance

Answer 44

- Length of resistance or wire - Thickness of resistance or wire - Material - Temperature

Question 45

Length Increase

Answer 45

Resistance increase

Question 46

Thickness increase

Answer 46

Resistance decrease

Question 47

How does the material affect the resistance

Answer 47

Some conductors are made from substances or materials with a greater or less intrinsic resistance (Copper, resistance decease and Tungsten, Resistance increase)

Question 48

How does the temperacture affect the resistance

Answer 48

Increasing temperature results in a greater degree of resistance to electron flow (Increase temp, Increase resistance)

Question 49

Charge

Answer 49

The degree to which an object has more, fewer, or the same number of electrons than protons, coulombs (C)

Question 50

What direction does charge flow

Answer 50

From positive to negative

Question 51

Electric Field

Answer 51

A region in which a charged object experiences a force

Question 52

Electrostatic forces

Answer 52

Electrostatic forces between charged particles cause movement of these charged particles

Question 53

m (mili)

Answer 53

x10^-3

Question 54

µ (micro)

Answer 54

x10^-6

Question 55

n (nano)

Answer 55

x10^-9

Question 56

p (pico)

Answer 56

x10^-12

Question 57

Gravitational potential energy

Answer 57

The potential energy an object has because of it height.

Question 58

Kinetic energy

Answer 58

Energy an object has when its moving

Question 59

Conductor

Answer 59

Materials that allow the flow of electric charge

Question 60

Insulator

Answer 60

Materials that do not allow the flow of electric charge

Question 61

Charge seperation

Answer 61

Occurs when charge is transferred from one object to another. Between insulators

Question 62

Static electricity

Answer 62

The result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged