Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Year 9 Science 2020 > Forces and Motion > Flashcards

Forces and Motion Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Upthrust

A

upwards force on a body due to displacement of water around it. sometimes called bouyancy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Lift

A

upwards force on an aeroplane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Weight

A

force due to gravitational attraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Friction

A

force created my particles rubbing of surfaces that opposes motion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

air/water resistance

A

frictional force caused by particles colliding with the body that opposes motian

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

magnetic

A

force caused by magnetic attraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Electrostatic

A

force caused by attraction between charges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

reaction

A

forces created by a body as a reaction to a force being applied

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

compression

A

Force on a body when it is being squashed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Tension

A

force on a body when it is being stretched

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

non-contact

A

if two objects or materials dont need to be touching for a force to have an effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

contact

A

if two objects or materials need to be touching for an force to have an effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what are the two types of friction

A

static friction and dynamic friction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is static friction

A

force to prevent an object from starting to move

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is dynamic friction

A

force that acts when something has started moving

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

equation for average speed

A

average speed = total distance divided by total time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

equation for acceleration

A

acceleration = change in velocity divided by change in time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

equation to find the force

A

force - mass times acceleration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

equation for weight

A

mass times gravitational field strength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what is weight

A

weight is the force that pulls all objects to the centre of the planet, it depends on the mass and gravitational field strength of an object.

21
Q

what would happen to your weight if it went to a place of a different gravitational field strength

A

it would change

22
Q

what would happen to your mass if you went to a place of a different gravitational field strength

A

it would stay the same since the amount of matter hasnt change only the gravitational field strength

23
Q

when would a falling parachutist reach terminal velocity

A

when its air resistance and weight are the same

24
Q

what is a ticker timer

A

ticker timer is a tape that marks dots to measure speed and it does this by marking dots at at a certain rate to show distance travelled in a certain time

25
Q

what is the rate of a ticker timer

A

50 dots per second (1/50s)

26
Q

what is balanced forces

A

balanced forces is two forces going in opposite directions that have the same amount of newtons and balance each other out

27
Q

what is unbalanced forces

A

unbalanced forces is when forces acting on an object are not equal and have different amount of newtons, it causes an object that doesn’t move to move and an object moving to change speed or direction

28
Q

what is a resultant force

A

a resultant force is made when there is forces acting on an object, when it is zero then the object wont change what its doing but when it isn’t zero it will make un unbalanced force

29
Q

what does stationary look like on a distance time graph

A

a flat horizontal straight line

30
Q

what does a constant speed look like on a distance time graph

A

a tilted straight line

31
Q

what does an acceleration look like on a distance time graph

A

a curve - backward c

32
Q

what does deceleration look like on a distance time graph

A

a curve - forward c

33
Q

what does a constant acceleration look like on a velocity time graph

A

a straight diagonal line

34
Q

what does constant speed look like on a velocity time graph

A

a flat straight horizontal line

35
Q

what does an acceleration look like on a velocity time graph

A

a curve

36
Q

what does a deceleration look like on a velocity time graph

A

a curve

37
Q

what type of graph does terminal velocity occur

A

velocity time graph

38
Q

how do you find the total distance travelled from a velocity time graph

A

you calculate the area below the line

39
Q

what forces occur on a hanging object

A

tension and weight

40
Q

what forces occur on a moving floating object (on water)

A

up thrust and weight (vertical), thrust and water resitance (horizontal)

41
Q

what forces occur on a stationary object: block on a table

A

weight and reaction

42
Q

what forces occur on a moving car at constant speed

A

friction and thrust are equal lengths (horizontal), reaction and weight

43
Q

what forces occur on a car accelerating

A

friction smaller than thrust, reaction and weight

44
Q

what forces occur on a rifle shooting with a kick back

A

thrust bigger than reaction

45
Q

what forces occur with a rocket taking off

A

lift bigger than reaction

46
Q

what forces occur at a parachutist at terminal velocity

A

air resistance and weight are equal

47
Q

what forces occur for a parachutist accelerating

A

weight bigger than air resistance

48
Q

how many metres are in a mile

A

1600

49
Q

thrust

A

forwards force created by a body

Year 9 Science 2020 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions