Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

BMAT > Physics - Mechanics > Flashcards

Physics - Mechanics Flashcards

1
Q

what type of quantity is speed

A

scalar quantity

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

speed equation

A

speed = d / t

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

what type of quantity is velocity

A

vector quantity

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

velocity equation

A

velocity = displacement / time

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

what type of quantity is acceleration

A

vector

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

acceleration equation

A

acceleration = velocity / time

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

what is acceleration

A

rate of change of velocity

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

what is acceleration

A

rate of change of velocity

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

distance time graph -
what does straight line mean

A

stationary object

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

distance time graph -
what does a straight diagonal line mean

A

object moving with constant velocity

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

distance time graph -
what is the gradient of the line

A

the velocity

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

distance time graph -
what is on x and y axis

A

x = time
y = distance

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

distance time graph -
what is a curved line

A

accelerating object

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

velocity time graphs -
what is does a horizontal line mean

A

object moving w constant velocity

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

velocity time graphs -
what does a straight diagonal line mean

A

constant acceleration

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

velocity time graphs -
what is the gradient of the line

A

acceleration

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

velocity time graphs -
what is the area under the graph

A

displacement / distance travelled

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

equation involving
- final velocity
- initial velocity
- acceleration
- time

A

v = u + at

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

equation involving
- displacement
- initial velocity
- final velocity
- time

A

s = 0.5(u+v)t

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

equation involving
- final velocity
- initial velocity
- acceleration
- displacement

A

v^2 = u^2 +2as

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

what is a force

A

interaction between two or more objects

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

how is acceleration caused

A

unopposed force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what type of quantity is force

A

vector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

what is the unit for force

A

Newtons (N)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
resultant force
sum of all forces
25
what is tension force
when a spring/string/wire is pulled by equal and opposite external forces at each end and as shown, said to be subjected to a tension force tension force typically causes extension on length of spring/string greater the tension, greater the extension
26
force-extension characteristics on a graph - what does it mean if the graph is steeper
more force required to produce a given extension
27
force-extension characteristics on a graph - what does it mean if the graph is shallower
greater the extension for a given force
28
when is a material described as rigid
if its deformation is small even with a large tension force
29
force-extension characteristics of copper wire
stretches uniformly initially, until it suddenly stretched more just before reaching breaking point
30
force-extension characteristics of glass
very rigid deforms only very slightly before breaking
31
force-extension characteristics of rubber
stretches non-uniformly
32
what does elastic mean
means the material will return to its original lenth when tension is removed
33
what does inelastic mean
material does not return to its original length when the tension is removed PLASTIC DEFORMATION
34
plastic deformation
material does not return to its original length when the tension is removed
35
what is the elastic limit
point at which extension goes from elastic to inelastic
36
what is Hooke's Law
extension is proportional to force applied F = Kx F = force in N x = extension in metres K = spring constant in N/m
37
what is spring constant a measure of
rigidity higher spring constant means higher force is required to produce a certain extension
38
limit of proportionality
point on force extension graph where the line is no longer straight material no longer obeys Hooke's Law (elastic limit)
39
what is spring constant affected by
- cross sectional area of spring (increased cross sectional area of spring increases spring constant) - length of spring (longer the spring, smaller the spring constant)
40
two identical springs in series will have resultant spring constant of ..
0.5 x spring constant of 1 spring
41
two identical springs in parallel will have resultant spring constant of ..
2 x spring constant of 1 spring
42
what happens when a spring is stretched
work is done energy is stored as elastic potential energy in the spring if elastic limit is not exceeded, energy will be released as kinetic energy
43
area under a force extension graph equation
E = 0.5Fx E = 0.5Kx^2
44
what happens if material is stretched beyond elastic limit
work done is partially or completely irretrievable as material will no longer return to its original length
45
newtons first law
an object will remain stationary or moving at a constant velocity unless a force acts upon it if resultant force is zero, then objects will also remain stationary or moving at a constant speed when a resultant force acts upon an object, the object will accelerate in the direction of the force
46
newtons second law
acceleration of an object is directly proportional to the resultant force acting upon the object furthermore, acceleration of an object is inversely proportional to the mass of an object resultant force = mass x acceleration F=ma
47
newtons third law
force exerted by object A on object B is equal in magnitude and opposite in direction to the force exerted by object B on object A
48
what is momentum
quantity of motion of moving body that is a product of its mass and velocity has symbol *italic p* measured in Kgm/s
49
momentum in a closed system
conserved
50
force applied to change momentum equation
force = change in momentum / change in time
51
car safety features
seatbelts and crumple zones extends time over which momentum changes, force exerted on passengers reduced occurs by using relationships between force, momentum and time
52
mass
quantity of object regardless of volume or forces symbol M measured in kg
53
weight
force exerted on body by gravity symbol W measured in N
54
how is weight calculated
mass of object x g g = 10 !!!!!!!
55
what happens when an object is in free fall
two forces acting on object is weight downwards and aerodynamic drag acting in opposite direction object starts falling , weight acting down > aerodynamic drag , therefore has acceleration down as object accelerates, magnitude of aerodynamic drag increases drag increases until it is equal to objects weight, at this point there is no resultant force acting on the object so it moves at constant velocity (TERMINAL VELOCITY)
56
terminal velocity
drag increases until it is equal to objects weight, at this point there is no resultant force acting on the object so it moves at constant velocity
57
why do skydivers use a parachute
increase their aerodynamic drag causing them to decelerate until the forces are once again balanced, and they continue to fall at a new, lower terminal velocity
58
energy
capacity of a body to do wok and work done is analogous to energy transferred measured in J
59
work done equation
work done = force x distance
60
power
rate of energy transfer
61
power equation
power = energy / time
62
GPE
energy stored in an object due to position in a gravitational field
63
change in GPE equation
mass x acceleration due to gravity x change in height
64
kinetic energy equation
1/2 x mass x velocity^2
65
what happens when there is no drag/resistance
all GPE will be converted to kinetic energy so M x G x H = 1/2 x M x V^2
66
what are the 9 forms of energy
1. heat 2. light 3. sound 4. kinetic 5. electric 6. nuclear 7. elastic potential 8. gravitational potential 9. chemical potential

BMAT (33 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions