Forces Flashcards

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

What are the units for density?

A

kg/m3

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

What is density

A

The amount of mass in a volume

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

Which state of matter is the densest?

A

Solid

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

What is the name of the equipment you would use to measure the volume of a solid by using water?

A

Displacement can

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

Describe mass

A

Mass is a measurement of the amount of matter, measured in kg.

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

Describe weight

A

Weight is a Force caused by a Mass in a Gravitational field.

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

How to calculate weight

A

mass x gravitational field strength

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

Why must there be a resultant force acting an object moving in a circle?

A

The object is constantly changing direction so its velocity is changing

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

What is the name of the force acting on an object moving in a circle?

A

Centripetal force

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

Describe the velocity of an object moving in a circle.

A

The object is constantly changing direction so its velocity is changing

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

State Newton’s second law in terms of momentum.

A

Force = change of momentum / time taken

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

What is Newton’s third law?

A

When Two Objects Interact, the forces they exert on each other are equal & opposite

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

What does equilibrium mean?

A

The Forces are BALANCED so the RESULTANT FORCE is ZERO

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

When two bodies interact, what can you say about the size and direction of the action and reaction force?

A

Equal and opposite

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

State the conservation of momentum.

A

The momentum before the collision will be the same as the momentum after the collision.

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

State calculation to find momentum.

A

Mass x velocity

17
Q

Three factors that increase thinking distance of a car

A

High speed, tiredness, drugs alcohol

18
Q

Three factors that increase braking distance of a car

A

High speed, worn tyres, worn brakes.

19
Q

What two factors make up the overall stopping distance of a car?

A

Thinking distance and braking distance

20
Q

Explain how air bags, crumple zone and seatbelt reduce injury

A

1) Increase the time taken for the object to stop