PHYSICS- moments Flashcards

1
Q

What do we call the point where a lever or seesaw is fixed?

A

The pivot

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

What do we call the force applied to a lever?

A

The effort

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

What do we call the weight or force moved by a lever?

A

The load

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

What do we call the turning effect of a force?

A

The moment

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

How do we calculate the moment of a force?

A

Moment = size of force x distance from pivot

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

What units do we use for the moment of a force?

A

Newton-metres (Nm) or Newton-centimetres (Ncm)

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

The principle of moments says a seesaw will balance when…

A

…the clockwise moment equals the anticlockwise moment

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

A simple version for the principle of moments for a seesaw is…

A

…(force x distance) on left = (force x distance) on righ

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

Pressure is equal to what?

A

Force ÷ Area

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

Units for pressure are what?

A

N/cm2 or N/m2 (also known as Pascals)

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

Objects which are wide and apply a small pressure include what?

A

skis, snowshoes, camels’ feet, tractor tyres, snowboards

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

Objects which work by applying a large pressure include what?

A

pin, sharp blade

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

An example of a device where a pressure is transmitted through a liquid from one place to another is what?

A

Hydraulic brakes

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