Brainscape's Knowledge GenomeTM

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


See full index

Ngo In Sons > Force and Motion > Flashcards

Force and Motion Flashcards

1
Q

Acceleration:

A

is the rate of change of speed

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

Displacement:

A

is a vector quantity and describes the overall change in position of an object from its original position

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

Inertia:

A

Is the object’s resistance to motion

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

Inertia devices:

A

Devices used as safety measures against inertia e.g. seat belts, airbags and head rests

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

Instantaneous speed:

A

Is the speed of an an object at any particular time

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

Scalar:

A

Is a quantity which has magnitude only

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

Vector:

A

Is a quantity which has magnitude and direction

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

Weight force:

A

Force on any object due to gravity

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

How do you calculate:

Average velocity=

A 
displacement/ time 
where: 
Velocity is in metres/ per second (m/s or m/s-1) 
Displacement in metres
Time in seconds
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How do you calculate:

Acceleration=

A 
final velocity- initial velocity/ time taken 
where:
Final velocity (m/s) 
Initial velocity (m/s)
Time (s) 
Acceleration (m/s/s or m/s2)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

For an object to accelerate a force is required. For the same object:

A

o A bigger force causes a faster acceleration than a smaller force
o A smaller mass will accelerate quickly than a larger mass

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

Conversion:

m/s -> km/h

A

X 3.6

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

Conversion:

km/h -> m/s

A

Divide 3.6

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

What are the three types of motion graphs?

A
  • Displacement time graph
  • Velocity- time graph
  • Acceleration- time graph
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Displacement- time graphs:

The slope gives______

A

object’s average speed/ velocity

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

Velocity- time graphs:

The slope gives_____

A

the rate of acceleration

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

What does the area under a velocity- time graph tell?

A

The distance travelled by an an object up to that line.

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

Ticker timer:

A

A device that measures speed

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

How many times does a ticker time vibrate per second?

A

50

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

What is the time between each dot in a ticker time?

A

0.02 seconds

21
Q

Ticker timer:

1) Constant velocity
2) Acceleration
3) Deceleration:

A

1) dots are evenly spread apart
2) dots become increasingly apart
3) dots become increasingly closer together

22
Q

Force:

A

Is a push, pull or twist

23
Q

How can force change to motion of an object?

A

o Accelerating objects
o Decelerating objects
o Changing the direction of objects
o Changing the shape of objects

24
Q

Contact forces:

A

When there is direct contact between force and object

25
Q

Friction:

A

Force acting between two rubbing surfaces

26
Q

Air resistance/ drag friction

A

When air (or liquid) moves across an object

27
Q

Tension:

A

Force in a straight rope as it pull on an object

28
Q

Surface tension:

A

Force between water particles to form a skin/ film on the surface of a liquid

29
Q

Buoyancy:

A

Water force acting upwards to keep objects afloat

30
Q

Lift:

A

Upward force covered by air moving over an airfoil e.g. wing of a plane

31
Q

Thrust:

A

force caused by gases/ liquids being pushed out from a propeller or engine

32
Q

Non contact force:

A

Occurs when an object is within a force field

33
Q

Weight:

A

gravity pulls object downwards towards the centre of the planet

34
Q

Electrostatic:

A

force of charged object, same charges repel each other, whilst opposite attract

35
Q

Magnetism:

A

force of magnets where same charges repel whilst opposite attract

36
Q

Force diagram:

A

represent the forces acting on an object
- Forces are drawn as line with arrowheads
o Arrow heads represents direction
- Length of arrow represents size

37
Q

Vector diagram:

A

allows us to sum the forces acting on an object (net force) and allows us to resolve if it is a balance or an unbalanced force

38
Q

Newton’s first law of motion:

A

An object will remain at rest or continue moving at a constant velocity in a straight path unless acted upon by a net unbalanced force

The heavier the object the more inertia it has
The faster the object the more inertia it has

39
Q

Newton’s second law of motion:

A
  • The acceleration of an object is related to the size of the force acting on the object and the mass of the object
  • F=ma
    Where:
    F= force (N)
    m= mass (kg)
    a= acceleration (m/s2)
40
Q

Newton’s third law of motion:

A
  • For every action force , there is an equal and opposite reaction force
  • When an object applies a force to another object, the second object applies an equal and opposite force to the first object.
41
Q

Nuclear potential energy:

A

Stored in nuclei of atoms and when nuclei split or combined energy is released into other forms

42
Q

Law of conservation of energy:

A

Energy cannot be destroyed or created, only transformed or transferred

43
Q

KE=

A 
1/2 mv^2 
Where; 
m= mass (kg)
KE= kinetic energy (J) 
v= velocity (m/s)
44
Q

Kinetic energy:

A

Energy of motion
NOTE:
- the faster the object the more KE it has
- the heavier the object the more KE it has

45
Q

Gravitational potential energy:

A 
Stored energy as object is lifted. Hence when an object is released GPE will be converted into KE causing it to accelerate to the ground. 
GPE= mgh 
m= mass (kg) 
g= gravity (9.8m/s^2) 
h= height (m)
46
Q

Elastic potential energy:

A

Energy in objects which are stretched or compressed e.g. rubber bands, balls and spring.
EPE is converted into KE

47
Q

Chemical potential energy:

A

Energy stood within chemicals. After a chemical reaction takes place, energy is converted into other forms e.g. kinetic, light, heat, electric

48
Q

Work:

A 
Occurs when a force is applied to an object. With the amount of work done related to the force that has been applied and the distance the object has travelled. 
W= Fd 
where: 
W= work(Nm) 
F= force (N) 
d= distance (m)

Ngo In Sons (7 decks)

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