Brainscape's Knowledge GenomeTM

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


See full index

science > FWE > Flashcards

FWE Flashcards

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

What’s the relationship btwn energy, work done and force?

A

energy required to have work done where an obj under the influence of a force

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

What is energy and its SI unit?

A

The capacity to do work, joule (J)

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

Define potential energy

A

Stored energy due to the body’s position or condition

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

What is chemical potential energy

A

Energy stored in fuels (e.g. petrol and food), released through chemical reactions

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

Define elastic potential energy

A

Amount of energy stored in an object that is stretched or compressed

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

What is gravitational potential energy

A

The amount of energy an object has based on its position or location

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

Factors affecting gravitational potential energy

A
  1. mass of obj
  2. height to ref level
    (direct)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is kinetic energy

A

Energy that a body has due to its motion

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

Factors affecting kinetic energy

A
  1. mass of obj
  2. speed of obj
    (direct)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Other types of energy?

A
  1. heat (thermal)
  2. light
  3. sound
  4. electrical energy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Thermal energy?

A

Energy flowing from high temp to low temp

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

Light energy?

A

Energy enabling us to see, given off by luminous sources

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

Sound energy?

A

Energy produced when objects vibrate & transmitted through a material, communicate & enjoy music

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

Electrical energy?

A

Energy transferred by flow of charged particles (electric current) & transmitted easily across long distances

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

What is the Principle of Conservation of Energy

A

Energy cannot be created or destroyed but can be converted from one form to another or transferred from one object to another

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

When a ball rebounds, why is it unable to reach its original position [3]

A

Some energy has been transferred to the surroundings as heat and sound when it hits the floor
EPE<GPE at original position
EPE converted to KE + GPE when ball bounces up. GPE at max. height of ball< total energy before

17
Q
A
18
Q

Name 4 properties of a force

A
  • Either a push or pull that exerts on another object
  • Has both magnitude and direction
  • Can cause a turning effect in objects and exert pressure on objects
  • Can change shape, size, direction of motion or speed
19
Q

How to calculate work done

A

Work done (J) = Force (N) x distance moved in the direction of the force (m)

20
Q

Define pressure

A

Amount of force acting perpendicularly on a unit of area

21
Q

Define work done

A

The conversion of energy when energy is transferred between objects or converted from one form to another

22
Q

How does energy overcome friction/air resistance

A

Converted to thermal and sound energy

23
Q

What does heat refer to

A

Flow of thermal energy

24
Q

What is electrical energy

A

Energy transferred by the flow of charged particles

25
Q

How is sound produced

A

When objects vibrate and it is transmitted through a material

26
Q

What is an elastic force

A

Force that is acting on a stretched or compressed object to return it to its original shape, in the opposite direction of the force exerted

27
Q

What is frictional force

A

Force exerted that opposes or tends to oppose the motion between surfaces in contact

28
Q

What is gravitational field strength

A

The gravitational force acting on a unit mass of an object

29
Q

What are electrostatic forces

A

The forces acting between two charged particles

30
Q

If the speed and direction of the object does not change, can we conclude that there are no forces acting on it

A

No. We can only conclude that there is no resultant/net force acting on it

31
Q

What is the force exerted by Earth’s atmosphere called

A

Atmospheric pressure

32
Q

What are the three criteria for work to be done

A
  • Force must be applied on object
  • Object must move
  • Object must move in direction of the force applied
33
Q

What are the three components of work done

A
  • Change in GPE
  • Change in KE
  • Energy converted to thermal and sound energy/work done against friction or air resistance

science (20 decks)

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