Brainscape's Knowledge GenomeTM

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


See full index

physics > Forces & Motion > Flashcards

Forces & Motion Flashcards

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

What equation links average speed, distance and time taken?

A

Average speed = distance moved / time taken

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

What equation links acceleration, change in velocity and time taken?

A

Acceleration = change in velocity / time taken

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

What equation links final speed, initial speed, acceleration and distance?

A

final speed2 = (initial speed)2 + (2 x acceleration x distance moved)

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

What equation links force, mass and acceleration?

A

Force = mass x acceleration

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

What equation links weight, mass and gravitational field strength?

A

Weight = mass x GFS

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

What equation links momentum, mass and velocity?

A

Momentum = mass x velocity

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

What equation links force, change in momentum and time taken?

A

Force = change in momentum / time taken

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

What equation uses the perpendicular distance from pivot and moment of a force?

A

Moment = force x perpendicular distance from pivot

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

Where does the weight of a body act through?

A

Centre of gravity

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

How to find change in velocity?

A

Final velocity - inital velocity

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

What are the units for acceleration/

A

m/s2

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

What are some scalar quantities?

A
  • Distance
  • Speed
  • Energy
  • Length
  • Power
  • Area
  • Mass
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are some vector quantities?

A
  • Displacement
  • Velocity
  • Acceleration
  • Force
  • Moment
  • Momentum
  • Current
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the forces?

A
  • Normal reaction
  • Thrust
  • Up-thrust
  • Gravity
  • Weight
  • Air-resistance /Drag
  • Tension
  • Lift
  • Electrostatic
  • Magnetic
  • Push/ pull
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is normal reaction force?

A

When a solid rests on a surface, it feels a reaction force of 90° to the surface

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

What is air resistance (drag)?

A
  • Drag occurs when an object moves through a fluid (air resistance in air)
  • Drag is affected by ts objects shape, the build it travels in and its speed
  • Drag opposes motion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is thrust?

A
  • A reaction force
  • Occurs when mass is pushed to the back of something, causing object to move forward
18
Q

Examples of thrust?

A
  • Rockets
  • Letting go of balloons
  • A jet engine
19
Q

What is tension?

A
  • Acts in strings, chains and cables when they are stretched
  • Force always acts parallel to string
20
Q

What is the opposite if tension?

A

Compression

21
Q

What is up-thrust?

A
  • Can only occur in fluid, why things float (buoyancy)
  • NOT THE SAME AS NORMAL REACTION FORCE
22
Q

What is elastic force?

A
  • A force required to stretch or compress a string
  • The stretching force is directly proportional to the extension
23
Q

Why are we attracted to the earth?

A

Its huge mass

24
Q

What is gravitational force?

A
  • Masses attract other masses
  • The gravitational pull we feel is called weight
25
Q

What is frictional force?

A
  • Friction always acts in the opposite direction to motion
  • Friction can be reduced with lubricants (oil in an engine), or a cushion of air (hovercraft)
26
Q

What is applied force?

A

Push or pull

27
Q

What causes electrostatic attraction?

A

Two opposite charges

28
Q

What causes electrostatic repulsion?

A

Two similar charges

29
Q

What causes magnetic attraction?

A

Two opposite poles

30
Q

What causes magnetic repulsion?

A

Two similar poles

31
Q

What is lift?

A
  • The force produced due to the flow of a build over an aerodynamic surface
  • In an aircraft it acts against gravity
32
Q

What is thinking distance?

A

Distance travelled while driver reacts to problem

33
Q

What is breaking distance?

A

Distance travelled once breaks are applied and car slows

34
Q

What factors effect thinking distance?

A
  • Alcohol
  • Tiredness
  • Age
  • Distractions
35
Q

What factors effect braking distance?

A
  • Quality of tires/ breaks
  • Road surface
  • Weight of car
36
Q

What does speed effect?

A

Breaking and thinking distance

37
Q

What is the principle of MOMENTS?

A

When total clockwise moment is equal to total anti-clockwise moment

38
Q

How to find the centre of mass?

A

1) Hang shape freely
2) Hang plumb line from pins
3) Mark where the line is with crosses
4) connect dots with a ruler
5) Repeat from a different point
6) centre of mass is where the lines cross

39
Q

What is Hookes Law?

A

An elastic material is one that returns to its original shape when the stretching force is removed

40
Q

What is plastic deformation?

A

When an object can no longer return to its original form after being stretched

physics (8 decks)

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