Science ~ Forces Flashcards

1
Q

How do you show an object accelerating

A

One arrow is longer than the other

2
Q

How do you show and object staying in place

A

Both arrows are the same length

3
Q

How do you show an object moving at a constant speed

A

Both arrows are the same length

4
Q

What are the 3 main forces

A

Push, pull and twist

5
Q

What is a contact force

A

There is a contact between exerting force and receiving force

6
Q

What is a non contact force

A

The result is visible but you cannot see the contact between the force and the agent

7
Q

What are 3 contact forces

A

Friction, Upthrust, Air resistance

8
Q

What were 3 non contact forces

A

Gravity, magnetic, electrostatic

9
Q

Friction

A

Contact

10
Q

Upthrust

A

Contact

11
Q

Air resistance

A

Contact

12
Q

Gravity

A

Non contact

13
Q

Magnetic

A

Non contact

14
Q

Electrostatic

A

Non contact

15
Q

What is force measured in

A

Newtons ( n )

16
Q

What do forces work in

A

Pairs opposing each other

17
Q

What is the piece of apparatus used to measure forces

A

Newton meter

18
Q

Do objects need to touch to interact

A

No

19
Q

What are the five things forces can make objects do

A

-Speed up or start moving
-slow down or stop
-change direction
-Turn
-change shape

20
Q

Are the forces balanced or unbalanced when the arrows are uneven

A

Unbalanced

21
Q

Are the forces balanced when the arrows are the same length?

A

Balanced

22
Q

What are forces

A

Pushes, pulls or twists

23
Q

What is speed

A

A measure of how far you travel in a set amount of time ￼

24
Q

How do you calculate speed

A

Speed = distance
————-
Time

25
Q

How do you calculate time

A

Time = distance
————-
Speed

26
Q

How do you calculate distance

A

Distance = speed x time

27
Q

What is the abbreviation for metres per second

A

M/S

28
Q

What is the abbreviation for miles per hour

A

mph

29
Q

What is the abbreviation for kilometres per hour

A

Km/h

30
Q

What does the slope of the line show in a distance time graph

A

The speed in which something is travelling

31
Q

If the line is steeper on a distance time graph what does that show?

A

That the object is moving faster

32
Q

What do flat sections show on a distance time graph? ￼

A

That the object has stopped

33
Q

What do downhill sections show on a distance time graph? ￼

A

The object is going back towards it starting point ￼

34
Q

What do curves represent on a distance time graph? ￼

A

The object is changing speed

35
Q

How do you calculate resultant force

A

Minus the smaller force from the larger force

36
Q

How do you calculate weight

A

Weight = mass x G.F.S (gravitational field strength)

37
Q

A

No

38
Q

Does weight change

A

Yes

39
Q

What is the unit for measuring G.F.S

A

n/kg

40
Q

Are mass and weight the same

A

No

41
Q

What is mass

A

The amount of matter an object contains

42
Q

What is weight

A

The force of gravity acting on an object’s mass ￼

43
Q

What is weight measured in

A

Newtons

44
Q

What is gravity

A

Gravity is a force that acts between objects that have mass

45
Q

The greater the object mass…￼

A

The greater the gravity exterted by that object