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year 10 > Physics GCSE Force (test 1) > Flashcards

Physics GCSE Force (test 1) Flashcards

1
Q

What type of quantity is force?

A
  • Force is a vector quantity
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2
Q

What do vector quality’s have?

A
  • magnitude
  • direction
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3
Q

What are vectors physical quantities?

A
  • force, velocity, displacement
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4
Q

What are scalers?

A
  • only have magnitude but no direction
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5
Q

What are scalers physical quantities?

A
  • speed, distance, mass, temperature
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6
Q

How are vectors represented?

A
  • by an arrow
  • the length of the arrow shows its magnitude and the direction of the arrow shows the direction of the quantity?
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7
Q

What is velocity?

A
  • velocity is a vector
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8
Q

What is speed?

A
  • speed is a scaler (length of each arrow is the same)
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9
Q

What is force?

A
  • push or pull on an object that is caused by interacting with something
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10
Q

What is a contact force?

A
  • When the two objects are touching for the force to act
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11
Q

What is a non- contact force?

A
  • Objects do not need to be touching for the force to act
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12
Q

What is an interactional pair?

A
  • pair of forces that are equal and opposite and act on two interacting objects (Newtons Third law)
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13
Q

What are the sun and earth attracted to each other by?

A

gravitational force (non contact force)
it is an equal but opposite attraction

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14
Q

When is an object in equilibrium?

A
  • When all of the forces on an object combine to give a resultant force of zero
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15
Q

What does three forces on a scale diagram form?

A
  • a triangle
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16
Q

What is the turning effect of a force?

A
  • a moment
17
Q

What is the equation for the moment of a force?

A

moment of a force= Force X Distance

18
Q

What is the distance in a moment?

A
  • Perpendicular distance from the pivot to the line of action of force
19
Q

What does the force of a spanner cause?

A
  • a turning effect of a moment on the nut (which acts as a pivot)
20
Q

How does the force or distance affect the moment?

A
  • the larger force or longer distance would mean a larger moment.
21
Q

How do you get the maximum moment?

A
  • push at right angles (perpendicular) to the spanner
22
Q

How does pushing at other angles affect the distance and moment?

A
  • smaller distance - so a smaller moment
23
Q

When is an object balanced?

A
  • if the total anticlockwise moment equals the total clockwise moment about a pivot
24
Q

What does levers increase?

A
  • the distance from the pivot at which the force is applied
25
Q

Why do levers make it easier to do work?

A

M=F X D
- less force is needed to get the same moment

26
Q

What are Gears?

A
  • Circular disks with teeth around the edge
27
Q

What do the gears teeth do?

A
  • interlock so the turning one causes another one to turn in the opposite direction
28
Q

What are gears used for?

A
  • to transmit the rotational effect of a force from one place to another
29
Q

What will a force transmitted to a larger gear cause?

A
  • a bigger moment as the distance to the pivot is bigger
30
Q

Which turns slower the larger gear or the smaller gear?

A

larger gear turns slower

31
Q

What is weight?

A
  • force acting on an object due to gravity (measured in newtons)
32
Q

Where can the force act from?

A
  • single point on the object (called its centre of mass)
33
Q

What is the centre of mass?

A
  • the point where you can assume the whole mass is concentrated
34
Q

What is Newtons Third Law of motion?

A

When two objects interact with each other, they exert equal and opposite forces on each other

35
Q

What is resultant force?

A
  • single force that has the same effect as all the forces acting on the object
36
Q

How can you find the centre of mass of a 2D object?

A
  • put a whole in one corner of the card and suspend the card from a rod
  • use a plumb line to draw a vertical line on the card from the rod
  • repeat procedure, hanging the card from a different corner
    -the point where the two lines meet is the centre of mass

year 10 (21 decks)

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