Brainscape's Knowledge GenomeTM

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


See full index

science 10 > physics > Flashcards

physics Flashcards

9.1-9.4

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

what is distance?

A

distance is the length between 2 points or objects

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

what is speed?

A

speed is a measure of how fast something moves.

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

what is average speed?

A

a measure of how fast something moves overall

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

what is instantaneous speed?

A

speed at a particular instant, eg stopping or speeding

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

converting units

A

1km/1hr = 1000m/60min = 1m/3.6s

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

speed calculations

A

speed = distance/time

distance=speedxtime

time= distance/speed

(memorise the triangle if it helps)

d
s t <———- the triangle

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

what is acceleration?

A

rate at which an object changes its velocity (velocity means a speed of something in a particular direction)

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

what is terminal velocity?

A

the constant speed that a free falling object eventually reaches when the resistance of the medium through which it’s falling prevents further acceleration

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

examples of acceleration

A

-driving a car and slowing down and speeding up during turns

-someone sprinting after stopping

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

average acceleration formula

A

average acc. = change in speed/ time
↓
=final speed-initial speed/time

OR

a=v-u/t

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

final speed formula

A

final speed=initial speed+(average acc+time)

OR

v=u(a+t)

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

what is a speed time graph?

A

a speed time graph shows an objects speed changes over time

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

an object speed may
-be constant (_____ line)
- increase (graph_______ _________)
-decrease (graph _________ __________)

A

a. flat
b. rising upwards
c. falling downwards

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

slope of speed-time graphs =?

A

acceleration

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

area of speed-time graphs=?

A

distance

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

distance of st graph (hints)

u can use area of ______

eg. triangle (_____) or square (______)

A

a. shapes
b. 1/2 bh
c. length x breadth

LEARN AREA FORMULAS ESPECIALLY TRIANGLES AND RECTANGLES

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

acceleration of st graph (hints)

have to use _____

eg. 5/2 = 2.5____

A

a. rise/run
b. m/s²

DO NOT FORGET TO WRITE UNITS

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

what did galileo galilei discover?

A

he discovered that objects stop because the force of friction acts in the opposite direction to their motion.

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

what is newtons first law of motion?

A

newtons first law of motion states that an object at rest will stay at rest unless acted upon by an unbalanced force.

(this law applies to motion as well, just replace ‘rest’ with ‘motion’)

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

expand on the first law of motion using a moving object

A

an object that is moving will continue to move in the same direction and speed unless that object is acted upon by an unbalanced force.

21
Q

what is inetria?

A

the tendency to resist any change in motion is an objects inetria.

22
Q

how does mass have an effect on inertia?

A

the larger the mass of an object, the greater its inertia, the harder it is to change it’s motion

23
Q

what could unbalanced force change?

A

-speed
-direction
-state
-motion

24
Q

RANDOM QUESTION!!!!!!
what is support

A

support is the upward force of an object (n)

25
Q

what is newtons second law of motion

A

an object will accelerate in the direction of an unbalanced force acting upon it.

26
Q

what does the size of the acceleration depend on?

A

it depends on the mass of the object and the size of the force acting upon

27
Q

a _______ force is needed to __________ a _________ load

A

a. larger
b. accelerate
c. heavier

28
Q

what is required to make an object accelerate faster?

A

a larger force is required for on object to accelerate at a faster rate

29
Q

formula for newtons second law of motion

A

f(net) = m x a

30
Q

how many forces are acting on an object at one time?

A

usually more than one

31
Q

acceleration formula (to find acceleration from f(net))

A

a = fnet/m

32
Q

what is newtons third law?

A

for every action force, there is an equal and opposite reaction force

33
Q

the acceleration that an object experiences due to a force depends on…

A

its mass

34
Q

an object with low mass will travel with much _______ acceleration than a more massive object

A

greater

35
Q

what is kinetic energy

A

the energy of a moving object is called kinetic energy

36
Q

the amount of kinetic energy an object has depends on…

A

its mass and speed

37
Q

object mass doubles = kinetic energy _____

A

doubles

38
Q

object speed doubles = kinetic energy _______________

A

increases by a factor of 4

39
Q

kinetic energy formula

A

KE = 1/2mv²

40
Q

what is potential energy?

A

potential energy is the energy that an object has because of its position or structure.

EXTRA
this gives objects the capacity to make things happen

41
Q

how does an object have gravitional potential energy?

A

if an object is positioned above the ground that means it has gravitational potential energy

42
Q

the greater the mass the _______ its gravitational potential energy will be

A

greater

43
Q

what has elastic potential energy?

A

a stretched or compressed object (most likely a spring) has elastic potential energy

44
Q

what is the law of conservation of energy?

A

energy may be transferred or transformed but it is never created or destroyed

45
Q

explain energy efficiency

A

some energy may be ‘lost’ because it changes into non-useful form such as heat and sound.

46
Q

the energy used is referred to as ____________

A

input

47
Q

using the diagram below, identify the input, useful energy and non useful energy for a DRILL)

electrical energy –> kinetic energy + sound energy + heat energy

A

input - electrical energy
useful energy - kinetic energy
non-useful energy - heat energy + sound energy

48
Q

efficient energy formula

A

useful energy output/ total energy output x 100%

science 10 (1 decks)

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