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Physics 107 > Review > Flashcards

Review Flashcards

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1
Q

Distance

A

The total move of an object without regard of direction

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2
Q

Distance Si unit

A

Metre

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3
Q

Speed

A

The rate at which an object is able to move or operate

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4
Q

Speed Si unit

A

Meter per second

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5
Q

How do you solve for speed

A

speed = distance / time

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6
Q

difference between speed and velocity

A

speed is the rate of time an object is moving along a path
velocity is the rate and direction

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7
Q

solve for velocity initial

A

velocity = speed / time

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8
Q

an object travels 25 m in 5s. What is the velocity?

A

5 m/s

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9
Q

what does constant velocity mean

A

An object moving the same distance every second.

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10
Q

Acceleration and its units

A

the rate at which an object gain speed or velocity over time
(M/s2)

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11
Q

solve for acceleration

A

a = vf - vi / t

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12
Q

another name for negative acceleration

A

deceleration retardation

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13
Q

a car changes from 10 m/s to 30 m/s in 8 seconds. what is the acceleration.

A

given tbd { delta d}
vi = 10 m/s (a)
vf = 30 m/s a = vf - vi / t
t = 8 s a = 30 - 10 = 20/ 8
a = 2.5 m/s2

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14
Q

a bicycle moving at 10 m/s stops in 10 seconds. what is its acceleration?

A

given tbd { delta d}
vi = 0 (a)
vf = 10 a = 10 - 0 =10
t = 10 a = 1 m/s2

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15
Q

constant acceleration

A

the change in velocity at a constant rate

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16
Q

force and its si unit

A

force moves tends to move, stops or tends to stop the motion of an object. (Newton N)

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17
Q

balanced forces

A

opposite in direction equal in size

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18
Q

how does an object move if the forces on it are balanced

A

the objects movement wont b e affected

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19
Q

how does an object move if the forces on it are unbalanced

A

an object will deviate from its original path it will displace or tilt the object

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20
Q

friction

A

the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against eachother.

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21
Q

newtons (1st, 2nd, 3rd) law of motion

A

1st) inertia an object at rest remains at rest,
an object in motion remains in motion at constant speed. unless acted upon by an unbalanced force.

2nd) f = ma

3rd) every action has an equal and opposite reaction.

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22
Q

mass and its si unit

A

mass is the amount of matter in an object (kg)

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23
Q

gravity

A

the force that attracts an object towards the center of the earth.

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24
Q

how does gravity depend on mass

A

mass is what causes gravitational force, without it there would be no gravity

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25
Q

the relationship between gravity and the distance between the masses

A

the more distance between masses the weaker the gravitational force

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26
Q

weight and its si unit

A

The force of gravity on a mass (newton N)

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27
Q

weight equation

A

weight = mass x gravitational field strength

w = m x g

28
Q

momentum and its si unit

A

the product of mass and velocity (p) (kg m/s)

29
Q

law of conservation of momentum

A

the total momentum of a system is constant if no external force is acting on it.

30
Q

elastic collision and inelastic collision differences

A

elastic has no net loss in kinetic energy
inelastic has a loss of kinetic energy

31
Q

explosion

A

rapid expansion in volume associated with an extreme outward release of energy.

32
Q

momentum and impulse are related by

A

the impulse experienced by an object is equal to the momentum

33
Q

difference between scalar and vector

A

vectors use direction scalar doesnt

34
Q

longitudinal waves

A

particles of the medium vibrate parallel to the motion of the wave.

35
Q

frequency of a wave with a speed of 0.4 m/s and wavelength of 0.020 m

A

f = v/f
f= 0.4/ 0.020
f = 20 Hz

36
Q

a period (T) of 0.005 seconds would be equal to a frequency of

A

200 Hz

37
Q

what type of wave travels at right angles to the energy transfer

A

transverse waves

38
Q

what type of wave has areas of rarefaction and compression

A

longitudinal waves

39
Q

what wave transmits from one place to others

A
40
Q

the distance between two consecutive troughs or crests is

A

wavelength

41
Q

the law of conservation of energy

A

the total energy of an isolated system is constant

42
Q

what happens to an object’s potential energy when it is taken to a high altitude

A

its potential energy increases

43
Q

energy

A

the ability to do work

44
Q

the rate of change of work

A

power

45
Q

power and its unit

A

the amount of energy used (watt) (p)

46
Q

potential energy is

A

energy that has potential to become another form of energy

47
Q

work done formula

A

W = Fd
Work = Force x Displacement

48
Q

an object mass 0.2 kg
velocity 0.5m/s
kinetic energy ?

A
49
Q

work =100 j
t = 20 s
power ?

A
50
Q

what quantity is equal to newton-meter

A

Joule

51
Q

law of reflection

A

the angle of reflection equals the angle of incidencfe

52
Q

joule/second is = to which si unit

A

Watt

53
Q

force 10 N
distance 5m
force = to displacement
what is the total work done

A
54
Q

20* C to K =

A
55
Q

force = 20 N
mass = 3kg
distance = 4m
f = perpendicular to 4m
work ?

A
56
Q

heat is

A

the energy transferred from on object to another as result in a difference of temperature

57
Q

when an object cools down molecules

A

it loses its kinetic energy and slows down

58
Q

what is not a good conductor of heat

A

plastic, wood, rubber

59
Q

electricity is

A

the flow of electrons

60
Q

cell and battery difference

A

cells convert chemical energy into electrical energy
battery is a group of cells that store electricity on chemical potential energy

61
Q

which side of a cell is positive

A

the long side

62
Q

coulomb is a unit for

A

electric charge

63
Q

direct current is

A

one directional flow of electric charge

64
Q

what is used to measure current

A

ampere

65
Q

how must the ammeter be connected in a circuit

A
66
Q

what unit is resistance measured in

A

ohm

67
Q

Ohm’s law states

A

The current through a conductor between two points is directly proportional to the voltage across two points

Physics 107 (1 decks)

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