Brainscape's Knowledge GenomeTM

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


See full index

Physics > Chapter 8 - Forces in balance > Flashcards

Chapter 8 - Forces in balance Flashcards

1
Q

Displacement

A

Distance travelled in a certain distance

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

Distance

A

How far an object moves

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

Vectors

A

Quantities that have both magnitude and a direction

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

Scalers

A

Quantities that have magnitude, no direction.

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

Examples of vectors (6)

A

Displacement, velocity, acceleration, force, weight, momentum

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

Examples of scalers (4)

A

Mass, speed, time, distance

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

Vectors shown through arrows

A

The direction of the arrow shows the direction of the vector, and the length of the arrow shows the magnitude of the vector

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

Scale diagrams

A

A diagram is used to show when more than one force is acting upon an object.

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

Force

A

A push or pull acting on an object because of an interaction with another object.

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

Contact force

A

A force that is exerted only when 2 objects touch

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

Non-contact force

A

A force that one object can apply to another object without touching it.

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

Examples of contact forces (4)

A

Friction, air resistance, tension, normal contact force.

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

Examples of non-contact force (3)

A

Gravitational forces, electrostatic forces, and magnetic forces.

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

Newton’s third law of motion

A

When 2 objects interact with each other, they exert an equal and opposite force on each other.

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

Driving force

A

The force of a vehicle that makes it move.

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

Friction in cars

A

A car can only move forward due to the friction between the car and the ground. Friction only acts where the tyre is in contact with the ground

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Resultant force

A

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
18
Q

Zeron resultant force

A

When all forces are balanced the object is stationary or travelling at a continuos speed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Newton’s first law of motion

A

An object at rest stays at rest and an object in motion stays in motion with the same speed and same direction unless acted upon by an unbalanced force.

20
Q

Unbalanced forces

A

Forces that cause a change in the motion of an object. The object’s movement depends on the size and direction of the resultant force.

21
Q

Free body diagram

A

A diagram that shows all the forces acting on an object.

22
Q

Calculating the resultant force.

A

The resultant force is equal to the difference between the forces and in the direction of the largest force.

23
Q

How to increase momentum

A

Increase the size of the force or increase the distance from pivot.

24
Q

The weight of an object is called?

A

A load

25
Q

The force applied to the lever is called?

A

Effort.

26
Q

Pivot

A

The point at which the lever turns.

27
Q

Examples of force multipliers.

A

Bottle openers and a pair of scissors.

28
Q

The line that a force acts along is called>

A

Line of action

29
Q

Force multiplier

A

A lever where the load is bigger than the effort.

30
Q

Gears

A

They act like levers as they multiply the effect of a turning force.

31
Q

How gears work.

A

Gear wheels exert an equal and opposite force on each other when their edges are in contact. The force of each gear acts perpendicular to the centre of the wheel

32
Q

Effects of sizes of gears

A

The turning force of a larger wheel acts further from the shaft than the turning force for a smaller gear. It means that the turning effect of the wheel shaft is bigger than the turning effect on the engine shaft

33
Q

Low gear

A

Low speed and high turning effect

34
Q

High gear

A

High speed and low turning effect

35
Q

Centre of mass

A

The point at which the mass of an object comes to rest and has no rotational forces when hanging. This is because the centre of mass is directly below then point of suspension.

36
Q

Identifying the centre of mass

A

If an object has more than one line of symmetry, the centre of mass is the pint at which the lines meet.

37
Q

Suspended equilibrium

A

The point at which an object comes to rest and has no rotational forces when hanging. This is because the centre of mass is directly below the point of suspension

38
Q

Principle of moments

A

The sum of all the clockwise moments about any point = the sum of all anticlockwise moments about the same point.

39
Q

A balanced seesaw

A

The monet of the left hand side must equal the moment of the right hand side for the seesaw to be balanced.

40
Q

Parallelogram of forces

A

A geometrical method is used to find the resultant force of two forces that don’t act on the same line.

41
Q

How to create a parallelogram of forces.

A

Draw the vectors of the forces at the correct angles to each other. Using a compass, complete the parallelogram. Measure the distance from the starting point to the opposite point of the parallelogram and that is the resultant force

42
Q

Resolution of forces

A

The process of considering a force in terms of two perpendicular components, which together have the same effect on an object as the force

43
Q

Conditions for an object to be in equilibrium

A

There are zero resultant forces on the object and the forces acting on the object have no overall turning effect.

44
Q

Identifying an object in equilibrium when the lines of action of the forces are parallel

A

The sum of the forces in one direction must be equal to the sum of the forces in the other direction.

45
Q

Identifying an object in equilibrium when the lines of action of the forces are not parallel.

A

The forces can be resolved into 2 components along the same perpendicular line. These components must then balance out if the object is in equilibrium.

Physics (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions