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Physics Year 9 > Test 1- Forces, Weight, Springs and Elasticity and Hooke's Law > Flashcards

Test 1- Forces, Weight, Springs and Elasticity and Hooke's Law Flashcards

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1
Q

Drag

A

The force that acts against an object moving through fluid (like friction for fluids)

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2
Q

Friction

A

The force that acts against an object sliding across a surface

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3
Q

Tension

A

The force in a string holding up a picture

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4
Q

Weight

A

The force acting on an object due to gravity

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5
Q

Lift

A

The force on the wings of an aircraft

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6
Q

Contact Force

A

The force that a solid exerts against an object

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7
Q

Thrust

A

The propulsive force from an engine

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8
Q

Electrostatic

A

The force between charged particles

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9
Q

Magnetic

A

The force between a magnet and an iron nail

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10
Q

W=mg

A

Weight= Mass x Gravitational field strength

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11
Q

A force

A

A push or pull on an object caused by it interacting with another object

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12
Q

What can happen when an object experiences a force

A

It could change speed (accelerate) or change shape (deform)

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13
Q

Contact forces

A

Objects have to be touching

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14
Q

Non-Contact forces

A

Objects do not have to be touching

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15
Q

What is that special random note about Normal Contact force?

A

Normal Contact force is perpendicular to a surface

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16
Q

W=mg

A

Weight (N) = Mass (kg) x Gravitational Field Strength (N/kg)

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17
Q

Gravitational Field Strength of Earth

A

9.8 N/kg

18
Q

What are the 3 possible results of exerting force on a spring?

A

Stretch, Compress and Bend

19
Q

How to calculate extension of a spring

A

New length - Original length

20
Q

Elastically deformed object

A

If an object goes back to its original shape and length when the force is removed

21
Q

Inelastically deformed object

A

If an object doesn’t go back to its original shape and length when the force is removed

22
Q

Hooke’s Law

A

The extension of an object that obeys Hooke’s Law is directly proportional to the force supplied

23
Q

Direct proportionality

A

Whatever % change to force you would get same % change to extension

24
Q

Directly proportional symbol

A

∝

25
Q

NOT ALL OBJECTS

A

OBEY HOOKE’S LAW!

26
Q

F = ke

A

Force applied (N) = Spring constant (N/m) x Extension (m)

27
Q

Spring Constant

A

How easy or hard to stretch

28
Q

The limit of proportionality

A

The point where an object stops obeying Hooke’s Law

29
Q

Elastic Limit

A

The point where an object can’t return to its original shape and length (The point where an elastically deformed object becomes inelastically deformed)

30
Q

When you do a question

A

Always write the formula

31
Q

Don’t forget

A

the units

32
Q

The force that acts against an object moving through fluid (like friction for fluids)

A

Drag

32
Q

Upthrust

A

The upward force exerted on an object that is in or on a fluid

33
Q

The force that acts against an object sliding across a surface

A

Friction

34
Q

The force in a string holding up a picture

A

Tension

35
Q

The force acting on an object due to gravity

A

Weight

36
Q

The force on the wings of an aircraft

A

Lift

37
Q

The force that a solid exerts against an object

A

Contact Force

38
Q

The propulsive force from an engine

A

Thrust

39
Q

The force between charged particles

A

Electrostatic

40
Q

The force between a magnet and an iron nail

A

Magnetic

41
Q

What are the 10 forces I looked at?

A

Friction, thrust, contact force, drag, lift, upthrust, weight, tension, electrostatic and magnetic

Physics Year 9 (1 decks)

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