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Science End Of Year Test Revison > Forces & Motion > Flashcards

Forces & Motion Flashcards

(31 cards)

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1
Q

What can forces change?

A

Change a shape of something, it’s speed or the direction it moves in

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2
Q

What is a contact force?

A

A force where there needs to be contact between objects before the force can have an affect

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3
Q

Example of contact forces

A

Air resistance, water resistance, upthrust and friction

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4
Q

What is a non contact force?

A

A force that can affect something from a distance

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5
Q

Example of non contact forces

A

Gravity, static electricity and magnetism

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6
Q

Where does air resistance react?

A

Against the force of movement

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7
Q

What is extension?

A

The amount by which a spring or other stretchy material has stretched

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8
Q

How do you calculate stretched length?

A

Stretched length subtract (-) original length

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9
Q

What is elastic?

A

An elastic material changes shape when there is a force on it but returns to its original shape once the force is removed

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10
Q

What is limit of proportionality?

A

the extension of a spring is proportional to the force on it up to a certain point

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11
Q

What is hookes law?

A

The law that says the extension of a spring is proportional to the force on it

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12
Q

What are plastic materials?

A

Materials that do not return to their original shape when a force is removed

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13
Q

What material is good to reduce friction?

A

Rubber

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14
Q

What can friction do?

A

Slow things down or make them stay still

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15
Q

What is reducing friction called?

A

Lubricants or lubrication

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16
Q

Examples of lubricants?

Study These Flashcards
A

Oil or grease

17
Q

How can air resistance and water resistance be reduced?

Study These Flashcards
A

By having smooth surfaces and smooth shapes

18
Q

What is pressure?

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A

The amount of force pushing on a certain area

19
Q

What is the formula to calculate pressure?

Study These Flashcards
A

Pressure = force/area

20
Q

If forces are unbalanced on a moving object what will happen?

Study These Flashcards
A

It will change it’s speed

21
Q

What do all stationary objects have on them?

Study These Flashcards
A

Balanced forces

22
Q

List different forces

Study These Flashcards
A

Friction, reaction, thrust, gravity, air resistance, water resistance, magnetic force, upthrust, tension, weight

23
Q

Name stores of energy?

Study These Flashcards
A

Kinetic, nuclear, chemical, elastic potential energy, gravitational potential energy, thermal

24
Q

Name energy transfers?

Study These Flashcards
A

Heat, sound, light, force, electricity

25
What is the law of conservation energy
energy cannot be created or destroyed it can only be transferred
26
What are the units of force?
Newtons
27
What are the units of distance?
Metres
28
What is the centre of mass?
the centre of mass is the point at which the object will balance. The force of gravity acts through the centre of mass
29
What is another name for turning effect?
Moment
30
What is the formula to find out moment?
Moment = force x distance from pivot
31
What is the equation for work done?
Work done = force x distance in the same direction as force

Science End Of Year Test Revison (2 decks)

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