Brainscape's Knowledge GenomeTM

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


See full index

Physics > Dynamics > Flashcards

Dynamics Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

Scaler quantity

A

Fully describes by a magnitude

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

Vector quantity

A

Fully describes by magnitude and direction

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

Examples of scaler quantitities

A

Speed
Distance
Time
Energy

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

Examples of vector quantities

A

Force
Velocity
Displacement
Acceleration

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

Average speed

A

Total distance divided by total time

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

Instantaneous speed

A

The speed at a point in time

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

Experiment to measure average speed

A

Measure the distance between 2 points with an appropriate measuring devise

Start timer as object passes point A

Stop timer as it passes through point B

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

Experiment to measure insataneous speed

A

A small length of a card is attached to a car

The car passes through a light gate

The timer measure how long it takes the card to pass through the light gate

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

Experiment to measure acceleration

A

Setup the software to calculate the initial speed at the first light gate and the final speed at the second light gate.

Release the trolley from rest so that it passes through the two light
gates.

Record the time taken for the trolley to pass from the first to the second light gate, using the stopclock.

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

What does constant speed require

A

Balanced forces

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

When does turminal velocity occur

A

Resistive forces balance the driving force

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

Newton’s first raw

A

An object will remain at rest or travel at the same speed, in a straight line, unless an unbalanced force acts on the object.

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

Newton’s second law

A

An object will accelerate in the same direction as the unbalanced force acting on it.
Force and acceleration are directly proportional

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

Newton’s third law

A

If A exerts a force on B, B exerts and equal but opposite force on A

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

Horizontal motion

A

Once the projectile has been fired there are no horizontal forces acting on it, therefore the horizontal velocity is constant.
Falls at a constant speed

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

Vertical motion

A

The vertical motion can be described as having constant vertical acceleration.

Affected by gravity

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

Displacement

A

Distance between 2 points in a given direction

18
Q

Acceleration

A

The change in unit time

19
Q

Friction

A

A force that oppose the balance of an object

20
Q

Terminal velocity

A

The constant velocity reached by an objects free fall

21
Q

Why would instantaneous speed have higher results than average speed

A

Instantaneous speed is calculated at max velocity

22
Q

Forces can change

A

Shape
Speed
Direction of object

23
Q

Questions of the weight of objects and people on the moon

A

Gravitational Reid strength numerically is equal to the accerlaeration when frictional forces are ignored

24
Q

Friction on lorry vs car

A

Larry has a higher weight, which means there is more friction acting on it when it turns, lorry weals are designed to keep lorry on the road

25
Q

Friction on skier

A

Skier need a low friction, This is why they wax their boards

26
Q

Why are to forces acting on an object not cancel each other out

A

They act on the same object

Equal and opposite forces cancel each other out

27
Q

What is acceleration when frictional forces are negligable

A

9.8ms-2

28
Q

Sky diver

A

Weight is more than air resistance

Terminal velocity- meaning weight and resistance balance falling at a constant speed

Parachute goes up meaning there is more air resistance than weight

Blanked forces act on skydivers

29
Q

Force on satalight

A

Forces on a satalight are unbalance as satalight changes direction

30
Q

Feather and hammer dropped on the moon from same height

A

They hit surface at the same time

Moon has no atmosphere meaning ther is no air resistance

31
Q

Calculation of light year

A

3x108 x 60 x 24 x24 x 365.25

32
Q

If it is slowing down

A

Negative acceleration

33
Q

Efficiency

A

How much useful energy is transferred and how much is lost

34
Q

Pendulum

A

The larger tha mass the more poetail energy

Mass has potential energy

Starts with potential energy and converts into kinetic energy

The pattern continues

Does not have enough energy to reach original height

Et = Ek + Ep

35
Q

The hier the mass

A

The lower the acceleration

36
Q

The higher the force

A

The higher the accleration

37
Q

Forces on a ball

A

Ball excess coward force on racket

Racket Eckerts and equal but opposite force on ball

38
Q

Object going round earth

A

The greater the velocity, the greater the distance

When it is fired at the right vertical velocity will go around to earth

Downwards motion matches curvature of earth

Friction less environment

Object will orbit earth eg a satalte

39
Q

Vacuum flask

A

Stop- Stops evaporation
Silver - prevents radiation
Vacuum - no conduction

40
Q

Less dense

A

Away from normal

41
Q

Accleration from v-t graph

A

Gradient

Physics (8 decks)

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