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Physics GCSE > P8: Forces In Balance > Flashcards

P8: Forces In Balance Flashcards

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1
Q

What is distance ?

A
  • How far an object moves
  • does not involve direction
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2
Q

What is displacement?

A
  • includes boththe distance of an object moves
  • measured in a striaght line from the start to the finish point of the direction of the straight line
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3
Q

What is magnitude?

A

The size of the quantity

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4
Q

What are scalars?

A

The physical quantity that have size/ magnitude but have no direction

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5
Q

What are vectors?

A

Physical quantities that have size/magnitude and direction

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6
Q

How to clarify a distance and displacement as scalar and vector?

A

Distance is a scalar quantity

Displacement is a vector quantity

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7
Q

What is the equation for speed?

A

Speed=distance/time

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8
Q

What is the equation for velocity?

A

Velocity= displacement/time

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9
Q

What is the equation for force?

A

Force= mass x acceleration

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10
Q

What are examples of scalar quantities?

A
  • length
  • area
  • volume
  • speed
  • mass
  • density
  • pressure
  • temp
  • energy
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11
Q

What are examples of vector quantities?

A
  • displacement
  • velocity
  • acceleration
  • momentum
  • force
  • lift
  • drag
  • thrust
  • weight
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12
Q

What are contact forces?

A

When two onjects must touch to interact

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13
Q

What are non-contact force?

A

When two objects exert a force on each other when they are not touching

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14
Q

What is a force?

A
  • Forces are what make objects move
  • e.g when you kick a football your foot is applying force to the ball
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15
Q

What is force measured in?

A

Newtons (N)

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16
Q

What happens when the forces are balanced?

A

The resultant force is zero

17
Q

What is the difference between mass and weight?

A

Mass:

  • measured of how many particles there are in your body

Weight:

  • measure of the pull of gravity on your body
18
Q

What is weight?

A

The gravitational forve with which the earth attracts the masses towards the centre

19
Q

What is upthrust ?

A

An object partly or completely submerged in greater pressure on its bottom surface of it top surface

20
Q

What is friction?

A

Force that resists the sliding or rolling of one solid object over another

21
Q

What is air ressitance?

A

A kind of friction that ocurs between air and another object

22
Q

What is reaction?

A

A force that acts in the opposite direction to an action force

23
Q

What is thrust?

A

The force which makes an object move

24
Q

What is resultant force?

A

Is a signle force that describes all the forces operating on an object

25
Q

What is balanced forced?

A

If the object is stationary it will remain

26
Q

What is unbalanced forced?

A

The force applied in one direction is greater than the force applied in the opposite direction

27
Q

What is the centre of mass?

A

A position defined relative to an object or system of object

Physics GCSE (9 decks)

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