Forces and Speed Flashcards

(42 cards)

1
Q

I am sat on a chair, what force is pushing up on me (stopping me from sinking)?

A

Reaction Force

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2
Q

What force acts on an object as it moves through the air/water and makes it slow down?

A

Air Resistance (air) /Drag (air/water)

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3
Q

Balanced Forces

A

Forces acting on an object that are the same size but act in different directions

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4
Q

Compress

A

To squash into a smaller space

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5
Q

What are Contact Forces

A

Forces that act when the object is in contact with a surface, air or water

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6
Q

Deform

A

To change shape

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7
Q

What force pushes or pulls something?

A

Driving Force

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8
Q

What is the name of the point when a spring will not return to its original length when force is removed?

A

Elastic Limit

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9
Q

The force acting between two charged objects is called what?

A

Electrostatic Force?

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10
Q

Equilibrium

A

Balanced

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11
Q

Extension

A

The amount by which an object gets longer when force is applied

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12
Q

Field

A

A region where something feels a force

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13
Q

Friction

A

The force that resists movement because of contact between surfaces

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14
Q

Gravity

A

A non-contact force that acts between two masses

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15
Q

Hooke’s Law

A

The law that says that if you double the force on an object the extension will double

(Extension = Force × Spring Constant)

There is a direct proportionality between extension and input force

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16
Q

Interaction Pair

A

When two objects interact there is a force on each one that is the same size but acts in opposing directions

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17
Q

Kilogram (kg)

A

A unit of mass (1000g)

18
Q

Lubrication

A

A substance that reduces friction between surfaces when they rub together

19
Q

Magnetic Force

A

The force between two magnets, or a magnet and a magnetic material

20
Q

Mass

A

The amount of matter (stuff 😊 ) an object is made up of

21
Q

Newton (N)

A

The unit of force, symbol N

22
Q

Newton meter

A

A piece of equipment used to measure weight in newtons

23
Q

Non-contact Force

A

A magnetic, electrostatic, or gravitational force that acts between objects that aren’t in contact

24
Q

Pull

A

A type of force

25
Push
A type of force
26
Reaction Force
The support force provided by a solid surface like a floor
27
Resistive Forces
Any forces that act to slow a moving object
28
Streamlined
Shaped to reduce resistance to motion from air or water
29
Tension
A stretching force
30
Unbalanced
Opposing forces on an object that are unequal
31
Weight
The force of the Earth on an object due to its mass
32
Formula for speed
Average speed (m/s) = total distance (m) ÷ total time (s)
33
Formula for weight
Weight (N) = mass (kg) x gravitational field strength (N/kg)
34
Formula for density
Density (g/cm³) = mass (kg) ÷ volume (cm³)
35
What are 3 characteristics of a streamlined shape?
1. Rounded front 2. Slowly tapering tail 3. Smooth shape with no projections (bumps)
36
Upthrust
A force pushing upwards on an object in liquid
37
Thrust
A push caused by an engine
38
Lift
A force pushing upwards on an object flying in the air
39
Resultant Force
Overall force (thrust - friction)
40
Independent Variable
The thing you change in an experiment
41
Dependant Variable
The thing you measure in an experiment
42
Control Variables
The things in an experiment that you keep the same