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Physics Flashcards

1
Q

What is the word equation for Weight?

A

Weight = Mass x Gravitational field strength

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2
Q

What is the symbol equation for Weight?

A

W = m x g

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3
Q

What is the word equation to calculate work done?

A

Work done = force x distance

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4
Q

What is the symbol equation for work done?

A

W = F x s

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5
Q

What is the word equation for force applied to a spring?

A

Force applied to spring = spring constant x extension

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6
Q

What is the word equation for distance

A

Distance = speed x time

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7
Q

What is the word equation for accelerating

A

Acceleration = change in velocity/time taken

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8
Q

What is the symbol equation for acceleration

A

a = (v-u)/t

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9
Q

What is the word equation for resultant force

A

Resultant force = mass x acceleration

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10
Q

What is the symbol equation for resultant force

A

F = m x a

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11
Q

What is the word equation for momentum

A

Momentum = mass x velocity

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12
Q

What is the symbol equation for momentum

A

P = m x v

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13
Q

What is the word equation for kinetic energy

A

Kinetic energy = 1/2 x mass x (velocity)squared

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14
Q

What symbol equation for kinetic energy

A

Ek = 1/2 x m x (v)squared

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15
Q

What is the word equation for gravitational potential energy

A

Gravitational potential energy = mass x gravitational field strength x height

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16
Q

What is the symbol equation for gravitational potential energy

A

Ep = m x g x h

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17
Q

What is the word equation for power in terms of energy

A

Power = energy transferred/time

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18
Q

What is the symbol equation for power in terms of energy

A

P = e/t

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19
Q

What is the word equation for power in terms of work done

A

Power = work done/time

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20
Q

What is the symbol equation for power in terms of work done

A

P = W/t

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21
Q

What is the word equation for efficiency in terms of energy

A

Efficiency = useful output energy transfer/total input energy transfer

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22
Q

What is the word equation for efficiency in terms of power

A

efficiency = useful power output/total power input

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23
Q

What is the word equation for wave speed

A

Wave speed = frequency x wavelength

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24
Q

What is the Symbol equation for wave length

A

V = f x λ

25
Q

What is the word equation for potential difference

A

Potential difference = current x resistance

26
Q

What is the Symbol equation for potential difference

A

V = I x R

27
Q

What is the word equation for power in terms of potential difference

A

Power = potential difference x current

28
Q

What is the symbol equation for power in terms of potential difference

A

P = V x I

29
Q

What is the word equation for power in terms of current

A

Power = (current)squared x resistance

30
Q

What is the symbol equation for power in terms of current

A

P = I squared x R

31
Q

What is the word equation for energy transferred

A

Energy transferred = charge flow x potential difference

32
Q

What is the symbol equation for energy transferred

A

E = P x t

33
Q

What is the word equation for energy transferred in terms of charge flow

A

Energy transferred = charge flow x potential difference

34
Q

What is the symbol equation for energy transferred in terms of charge flow

A

E = Q x V

35
Q

What is the word equation for density

A

Density = mass/volume

36
Q

What is the symbol equation for density

A

P = m/v

37
Q

What are the four magnetic metals?

A

Iron, nickel, steel, and cobalt

38
Q

Describe the magnetic field inside a solenoid

A

Strong and Uniform

39
Q

How can we use a compass to plot the pattern of the magnetic field lines around a magnet

A

Place plotting compass near the magnet on a piece of paper. Mark the direction the compass needle points. Move the plotting compass to many different positions in the magnetic field, marking the needle direction each time. Join the points to show the field lines

40
Q

What is the effect called that causes a force to be exerted on a current-carrying wire when it is placed within a magnetic field

A

The motor effect

41
Q

What is a permanent magnet?

A

A permanent magnet is one that produces its own magnetic field

42
Q

What kind of magnet has the same magnetic field as the long coil of wire

A

A bar magnet

43
Q

What direction do magnetic field lines go in

A

North to south

44
Q

What is an induced magnet?

A

An induced magnet becomes a magnet in a magnetic field

45
Q

Is magnetism a contact or non-contact force

A

Non-contact

46
Q

What is a magnetic compass made off? What direction does it point in?

A

It is a small magnet and it points north

47
Q

How does an electric motor work

A

A coil of wire carrying a current in a magnetic field experiences a force that makes it rotate. A split ring commutator changes the current direction every half turn

48
Q

What happens to the strength of a magnetic field the further you go away from the magnet?

A

It weakens

49
Q

What is the main advantage of using an electromagnet vs a permanent magnet

A

It can be turned of and on

50
Q

What rule can we use to draw the magnetic pattern of a magnetic field pattern for a straight wire?

A

The right-hand rule

51
Q

Like poles , unlike poles .

A

Like poles repel, unlike poles repel

52
Q

What do the fingers stand for in Flemings’ left-hand rule?

A

FBI (Direction of Force, Direction of Magnetic Field(N to S), Direction of current(+ to -)

53
Q

Name 3 ways that we can make an electromagnet stronger.

A

You can increase the turns in the coil, add iron core, increase the current.

54
Q

What is the difference between a contact and a non-contact force?

A

Contact forces need to touch, non contact do not

55
Q

What causes a wire to produce a magnetic field

A

Electric current

56
Q

What is the equation for the force of a current-carrying a wire

A

F = B x l x l (Force = Magnetic flux density x current x length of wire)

57
Q

Where is the field of a bar magnet strongest

A

the poles

58
Q

What is the scientific name for a long coil of wire

A

A solenoid

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