Brainscape's Knowledge GenomeTM

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


See full index

Physics > P8 > Flashcards

P8 Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

What is displacement?

A

Distance without change in direction.

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

What is a vector?

A

Physical quantities with size (magnitude) and direction.

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

What is a scalar?

A

Physical quantities with size but no direction.

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

What is weight?

A

Force of gravitational field on an object.

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

What is mass?

A

Amount of matter.

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

What is velocity?

A

Speed in a certain direction.

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

What is power?

A

Rate of change of energy.

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

What is force?

A

Push or pull that acts on an object.

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

What is the third law of motion

A

Every action has an equal and opposite reaction

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

What can a force cause an object to do?

A

Change shape (stretch or squash), change its motion (accelerate/decelerate), change its state of rest (start moving).

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

What is friction?

A

The force exerted by a surface against an object when it moves across it.

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

What does ‘every action has an equal and opposite reaction’ mean?

A

It describes Newton’s third law of motion.

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

What is a resultant force?

A

Single force that has the same effect as all the forces acting on the object.

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

What is a balanced force?

A

If the resultant force acting on an object is zero, all the forces are said to be balanced.

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

What is an unbalanced force?

A

If the resultant force acting on an object is not zero, all the forces are said to be unbalanced.

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

What is a moment?

A

Turning force around a fixed pivot.

17
Q

How is moment calculated?

A

Moment = Force x Distance from pivot.

18
Q

What are force multipliers?

A

They multiply the applied force allowing you to lift more for less work.

19
Q

What is the role of gears?

A

Transfer force and change the moment of a turning effect.

20
Q

How is moment calculated with gears?

A

Moment = Force x Gear radius.

21
Q

What is the centre of mass?

A

Point at which its mass can be thought of as being concentrated.

22
Q

How do you find the centre of mass for irregular objects?

A

We need a plumb line.

23
Q

How to calculate a resultant force when forces are not opposing one another

A

Parallelogram of forces ( compass method )

24
Q

What is a resolving force

A

The vertical and horizontal components of a force

25
Q

How to calculate resolving forces

A

Draw an axis at the end of the resultant force after a scale has been made .
Measure how far the resultant force extends in cm on to each axis .
Convert the cm to N i with your scale to find the vertical and horizontal components to the force

Physics (3 decks)

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