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Physics paper 2 > Forces in Balance > Flashcards

Forces in Balance Flashcards

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1
Q

Contact forces examples

A
  • Friction
  • Air resistance (contact with air)
  • Tension (pulling force being exerted)
  • Reaction force
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2
Q

Non-contact forces examples

A
  • Gravitational force
  • Magnetic force
  • Electrostatic force
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3
Q

Scalars

A

Only have magnitude (measured with a number)

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4
Q

Scalars examples

A
  • Speed
  • Distance
  • Mass
  • Temperature
  • Time
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5
Q

Vectors

A

Has both magnitude and direction

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6
Q

Vectors examples

A
  • Velocity
  • Displacement
  • Acceleration
  • Force
  • Momentum
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7
Q

resultant force

A

The overall force on a point or object

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8
Q

what does it mean by an object being at equilibrium

A

The resultant force is 0 because the forces are balanced

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9
Q

work done

A

when a force moves an object through a distance, energy is transferred and work is done on the object

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10
Q

elastic deformation

A

when an object can go back to its original shape after the force has been removed

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11
Q

inelastic deformation

A

when an object doesnt return back to its original shape after the force has been removed

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12
Q

extension

A

increase in length of a spring when its stretched

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13
Q

spring constant

A

how many N it would take to stretch the object by 1M

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14
Q

hooke’s law

A

the extension of a stretched spring is directly proportional to the force applied

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15
Q

limit of proportionality

A

object wont go back to its original shape (inelastically deformed)

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16
Q

higher spring constant

A

more firm and harder to stretch

17
Q

what is spring constant measured in

A

n/m

18
Q

J = ???Nm

A

1

19
Q

elastic potential energy

A

energy transferred to an object as its stretched

20
Q

moments

A

the turning effect of a force

21
Q

moment measurement

A

Nm

22
Q
A
23
Q

levers

A

transmit the turning effect of a force

24
Q

what happens if the input and output forces are at opposite end of the pivot?

A

act in different directions

25
Q

gears

A

transmitting turning effects

26
Q

gear rotation

A

rotates in opposite directions (anti clockwise and clockwise)

27
Q

gear sizes

A

Different sizes, one is 2x larger than the other

Physics paper 2 (9 decks)

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