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Physics > Forces > Flashcards

Forces Flashcards

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0
Q

The steeper the line -

A

The faster your going

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1
Q

What is the formula for average speed?

A

Average speed = distance

Time

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2
Q

/ = ? Distance graph
- = ?
) = ?
( = ?

A 
/ = Constant speed
- = Stationary 
) = Accelerating
( = Decelerating
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3
Q

The velocity of a body is its speed -

A

In a given direction

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4
Q

What is the Acceleration formula?

A

Acceleration = Velocity change

Time taken

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5
Q 
/ = ?             Velocity graph 
- = ?
\ = ?
) = ?

When is the car stationary on a distance time graph?

A 
/ = Accelerating 
- = Steady speed
\ = Deceleration
) = increasing acceleration

At 0

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6
Q

A force acting on an object can change its: (3)

A
  • Speed
  • Direction
  • Shape
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7
Q

The length of the arrow shows how _______ the force is.

A

The length of the arrow shows how strong the force is.

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8
Q

Forces are measured in ________.

A

Forces are measured in newtons.

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9
Q

A vector quantity has ______ + __________.

A

A vector quantity has size + direction

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10
Q

A force is a ______ or _____ acting on an object.

A

A force is a push or pull acting on an object.

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11
Q

( )
/_______ ( ) ____ \
\ ( ) /

A

Left
( )
/_______ ( ) ____ \
\ ( ) /

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12
Q

______
/ \
/__|________| _______\
\ O O /

A

Right ______
/ \
/__|________| _______\
\ O O /

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13
Q

The force of attraction between any 2 body mass

A

Gravity

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14
Q

The upward force in water, equal to the weight of the displaced water.

A

Up thrust

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15
Q

The force that opposes the motion of 2 surfaces In contact with each other.

A

Friction

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16
Q

Distance travelled

A

Distance travelled

17
Q

_______________ = _______________

A

Distance travelled = Area under the graph

18
Q


5 | /
|/____
4

A

|
5 | / 5x4= 20 / 2 = 10
|/___.
4

19
Q

Resultant force

A

Resultant force

20
Q

Velocity time graph is the ______ under the graph.

A

Velocity time graph is the area under the graph.

21
Q

If a force acts on something you will see a change in ________, ________ or _________.

A

If a force acts on something you will see a change in speed, shape or direction.

22
Q

______
-> |______| ->

How do you work it out?

A

You find a resultant force.

- or +

23
Q

If there is not a __________ force there is ___ charge.

A

If there is not a resultant force there is no charge.

24
Q

If the resultant force is _____ you see a change in ________, ________ or ______.

A

If the resultant force is 0 you see a change in speed, direction or shape.

25
Q

If a force acts to oppose movement this is called …

A

Friction

26
Q

When __ touching _________ experience a ________ when they _______ _______ each other and kinetic energy is __________ to ______ energy this is called ________.

A

When 2 touching surface experience a force when they move over each other and kinetic energy is converted to heat energy this is called friction.

27
Q

The size of acceleration depends on the size of the ________ and ________ of an object.

A

The size of acceleration depends on the size of the force and mass of an object.

28
Q

Terminal velocity is …

A

The maximum speed of an object there there can be no more acceleration

29
Q

Faster the object is travelling ….

A

The longer the braking distance harder to stop.

30
Q

The weight of an o an object is through …

A

The centre of its gravity

31
Q

If an object leans over its base then it will …

A

Topple over

32
Q

Hookes law definition

A

The extension of a spring is directly proportional to the forces used to stretch the spring.

33
Q

A rubber band ______ obey hooks law

A

Doesn’t

34
Q

A spring ________ obeys hookes law

A

Does

35
Q

Factors that might increase stopping distance

A

Greater speed
Tiredness
Alcohol and drugs
Distractions

36
Q

Braking distance might be increased by

A

Greater speed
Poor road conditions (icy, wet)
Car conditions (bald tyres, poor brakes, full of people)

37
Q

The stopping distance is much further for faster speeds, which is why you should:

A

Keep your distance from the car in front, especially if the road conditions are poor.
Keep to the speed limit.

38
Q

Faster traveling ___________ the braking distance to stop

A

Faster traveling longer the braking distance to stop

39
Q

The weight of an object is though it’s …

A

The weight of an object is though it’s centre of gravity

40
Q

Total stopping distance = ….

A

Thinking distance and braking distance

Physics (9 decks)

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