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Y8 Physics > Forces > Flashcards

Forces Flashcards

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1
Q

What is physics?

A

Physics is the study of how objects interact, move, and are affected by forces.

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2
Q

What is the main goal of physics?

A

To understand how the universe behaves.

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3
Q

What is energy?

A

Ability to do work.

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4
Q

Force

A

A force is a push or a pull that acts on an object due to the interaction with another object.

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5
Q

Motion

A

Motion is the change in position of an object with respect to time.

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6
Q

Light

A

A type of electromagnetic radiation that makes the object visible to the eye.

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7
Q

Sound

A

Is a vibration that travels as a wave through a medium.

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8
Q

Waves

A

are a disturbance that transfers energy from one place to another.

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9
Q

Electricity

A

Is the flow of electrical power or charge.

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10
Q

Astronomy

A

The study of my everything in the universe beyond the earth’s atmosphere.

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11
Q

Nuclear

A

The energy in the core of an atom.

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12
Q

A force is…

A

a push or a pull.
a twist or a turn.

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13
Q

Identify the change of force on a car driving forward?

A

Speed.

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14
Q

Identify the change of force when a ball is bounced?

A

Direction

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15
Q

Identify the change of force on a bow when a bow is loaded.

A

Shape

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16
Q

How is force measured?

A

Using a Newtown meter.

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17
Q

The unit of force is measured in….

A

Newtons (N).

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18
Q

Match the forces to their description:
A force created by gravity pulling an object.

A

Weight

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19
Q

Match the forces to their description:
An opposing force created when an object has to move through air.

A

Air resistance

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20
Q

Match the forces to their description:
A force that pushes an object up when it is in a liquid.

A

Upthrust

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21
Q

Match the forces to their description:
Force created when two objects rub together.

A

Friction.

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22
Q

Match the forces to their description:
A force when an object is. Moved either forwards or backwards.

A

Push or Pull.

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23
Q

What equipment is used to measure force?

A

Newton meter.

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24
Q

What forces are trying to stop a car moving?

A

Air resistance, friction, weight.

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25
Q

Which force always goes against moving objects?

A

Air resistance.

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26
Q

Which force causes objects to float in water?

A

Up thrust

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27
Q

Which force slows down objects which are moving through the air?

A

Air resistance

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28
Q

Which force causes objects to be pulled towards the ground.

A

Gravity

29
Q

If the forces are equal the object will…

A

Be stationary or stay moving at the same speed.

30
Q

If the forces on an object are different, the object will change…

A

Size, shape or direction

31
Q

Which forces could affect a cars speed?

A

DF, friction, AR and gravity.

32
Q

What factors would increase the speed of the car?

A

Increasing the forward force.
Decreasing the air Resistance.
Decreasing the weight.

33
Q

An object in water has two forces acting upon it…

A

Upthrust
Weight

34
Q

What is upthrust?

A

The upward force exerted by a liquid on the object.

35
Q

What is weight?

A

The force of gravity on the object.

36
Q

Why does the boat float?

A

The forces of weight and upthrust are balanced.

37
Q

Why do dive toys sink?

A

Because weight is greater than upthrust.

38
Q

How to measure volume of liquids accurately?

A

With the eye in line with the water level at the bottom of the curve.

39
Q

What is the curve called when measuring the volume of liquids.

A

Meniscus

40
Q

Volumes of liquids can be measured in…

A

Litres L
Millimetres ML

41
Q

How can we measure the volume of a shape which is irregular?

A

Fill the measuring cylinder. Measure water.
Put in stone and measure again.

42
Q

What is density?

A

Mass
______
Volume

43
Q

The density is known as it’s

A

Mass per unit volume.

44
Q

What is the unit of density?

A

Grams per cubic centimetre
g/cm3

45
Q

How do you calculate volume?

A

Volume= length x width x height

46
Q

What equipment is used to find out the mass of an object?

A

Top-pan balance

47
Q

What is the Density equation?

A

Density=mass ÷ volume.
Density =400g ÷120cm3

48
Q

Float or sink?
If the density is greater than 1g/cm3 it will

A

Sink

49
Q

Float or sink?
If the density is less than 1g/cm3 it will…

A

Float

50
Q

What is the density of water?

A

1g/cm3

51
Q

What is the density of water?

A

1g/cm3

52
Q

Calculate the density of:
Block of copper: 3cm.long, 2cm high, 2cm wide. It has a massive of 108g

A

9g per cm3

53
Q

Block of aluminium length 5cm, height 1cm, width 2 cm and mass of 27g.

A

2.7g per cm3

54
Q

How would you find density of the metal clip?

A

Find volume in the cylinder of water
Measure mass on top pan balance.
Density= mass
——–
Volume

55
Q

What are magnetic fields?

A

The region where it has a magnetic effect.

56
Q

What happens when a magnetic material is placed in a magnetic field?

A

It will experience a force.

57
Q

What materials are magnetic?

A
58
Q

Common uses of magnets?

A

Fridge magnet
Compass
Scrap yard
Metal detector

59
Q

Where is the strength of the magnetic field greatest?

A

At the poles north and south.

60
Q

What happens when you bring two north poles alike together.

A

Repell

61
Q

What can know about the magnetic fields.

A

They never touch or cross.
Continuous.
Closer together the stronger the force.
North to south

62
Q

What happens when you bring North and south pole together?

A

Attract

63
Q

What happens when you bring two south poles together?

A

Repel moving away from each other.

64
Q

Is the earth is a magnet?

A

True

65
Q

Volume is the

A

Space occupied by an object

66
Q

Weight is

A

Force due to gravity acting on a massive measured in newtons.

67
Q

Upthrust is…

A

Upwards force of a liquid on an object placed on its surface.

68
Q

Streamlined means

A

Objects designed with smooth and curved surface to minimise opposing forces such as air resistance or drag.

69
Q

Streamlined means

A

Objects designed with smooth and curved surface to minimise opposing forces such as air resistance or drag.

Y8 Physics (1 decks)

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