Forces: Keywords

studied byStudied by 0 people
0.0(0)
Get a hint
Hint

acceleration

1 / 41

flashcard set

Earn XP

Description and Tags

42 Terms

1

acceleration

The rate of change of velocity. It can be calculated from the gradient of a velocity-time graph.

New cards
2

atmosphere

The thin layer of air surrounding the Earth, which gets less dense with increasing altitude.

New cards
3

braking distance

The distance a vehicle travels under the braking force. This can be affected by adverse road and weather conditions as well as the condition of the vehicle.

New cards
4

center of mass

The single point through which the weight of the object can be said to act.

New cards
5

changes in momentum

When a force acts on a moving object, or one an object that has the ability to move, this will occur. The force is equal to the rate of - .

New cards
6

conservation of momentum

The total momentum of a system before an event is always equal to the total momentum of the system after the event.

New cards
7

contact force

A force that occurs when objects are physically touching.

New cards
8

displacement

A measure of how far an object moves in a given direction. It is the straight line between the starting and finishing points and is a vector quantity.

New cards
9

distance

A measure of how far an object moves, that does not depend on direction and is therefore a scalar quantity.

New cards
10

elastic deformation

Non-permanent deformation which allows the object to return to its original shape when the deforming forces are removed.

New cards
11

elastic limit

The force beyond which an object will no longer deform elastically, and will instead deform plastically.

New cards
12

elastic potential energy

The energy stored in a spring when it is stretched or compressed, due to the work done on the spring by the deforming force. It is equal to the work done as long as the object does not plastically deform.

New cards
13

equilibrium

An object is in this if the resultant force and resultant moment are both equal to zero.

New cards
14

floating

An object will - if the volume of liquid it displaces has a greater weight than that of the object itself. The upthrust acting on the object is greater than its weight.

New cards
15

fluid

A liquid or gas.

New cards
16

forces

A push or pull that an object experiences due to the interaction with another object. Force is a vector quantity.

New cards
17

inertia

The tendency of an object to remain in its same state of uniform motion or rest.

New cards
18

inertial mass

A measure of how hard it is to change an object’s velocity. It is defined as the ratio of force over acceleration.

New cards
19

limit of proportionality

The point beyond which the extension of an elastic object is no longer directly proportional to the force applied to it.

New cards
20

moment

The turning effect of a force, equal to the product of the magnitude of the force and the perpendicular distance from the pivot to the line of action of the force.

New cards
21

momentum

The product of an object’s mass and velocity.

New cards
22

newton meter

A calibrated spring-balance used to measure weight.

New cards
23

Newton’s first law

If a stationary object’s resultant force is zero, the object will remain stationary. If a moving object’s resultant force is zero, the object will continue to move at the same speed, and in the same direction.

New cards
24

Newton’s second law

An object’s acceleration is directly proportional to the force applied to it, and inversely proportional to its mass.

New cards
25

Newton’s third law

The forces that two objects exert on each other when they interact are equal and opposite.

New cards
26

non-contact forces

A force that occurs when objects are physically separated.

New cards
27

plastic deformation

Permanent deformation which means the object will no longer return to its original shape when the deforming forces are removed.

New cards
28

pressure in a column

The pressure in a column of liquid is equal to the product of the liquid’s density, the height of the column and the gravitational field strength.

New cards
29

resolution of forces

All forces can be resolved into two perpendicular components that have the same effect as the single force.

New cards
30

resultant orce

The single force that can replace all the individual forces acting on an object, and have the same effect.

New cards
31

resultant moment

The single moment that has the same effect as the sum of all the other clockwise and anticlockwise moments acting on an object.

New cards
32

scalar quantities

Quantities that only have a magnitude, not a direction.

New cards
33

sinking

An object will - if the volume of liquid it displaces has a lower weight than that of the object itself. The upthrust acting on the object is lower than its weight and so there is a resultant downwards force

New cards
34

speed

A scalar quantity that is a measure of the rate of increase of distance.

New cards
35

spring constant

A measure of a spring’s stiffness, which is the constant of proportionality for a spring’s extension. The higher this is, the smaller the extension is for a given force.

New cards
36

stopping distance

The sum of the thinking and braking distances.

New cards
37

thinking distance

The distance a vehicle travels during the driver’s reaction time. Typical human reaction times are in the range of 0.2-0.9 seconds. This reaction time may be affected by tiredness, drugs or alcohol.

New cards
38

upthrust

The upward force acting on an object in a fluid, due to it experiencing a greater pressure below it than above it.

New cards
39

vector quantities

Quantities that have both a magnitude and direction. They are represented by an arrow, with the length representing the magnitude and the arrowhead representing the direction.

New cards
40

velocity

A vector quantity that is a measure of the rate of change of displacement. It is the speed in a given direction.

New cards
41

weight

The force acting on an object due to gravity. It is equal to the product of the object’s mass and the gravitational field strength at its location.

New cards
42

work done

When a force causes it to move through a distance. It is directly proportional to the distance travelled and the magnitude of the force in the direction of motion.

New cards

Explore top notes

note Note
studied byStudied by 18 people
... ago
4.0(1)
note Note
studied byStudied by 12 people
... ago
5.0(1)
note Note
studied byStudied by 34 people
... ago
5.0(1)
note Note
studied byStudied by 13 people
... ago
5.0(2)
note Note
studied byStudied by 1 person
... ago
5.0(1)
note Note
studied byStudied by 57 people
... ago
5.0(1)
note Note
studied byStudied by 22 people
... ago
5.0(1)
note Note
studied byStudied by 1975 people
... ago
4.7(11)

Explore top flashcards

flashcards Flashcard (93)
studied byStudied by 1 person
... ago
5.0(1)
flashcards Flashcard (115)
studied byStudied by 13 people
... ago
5.0(2)
flashcards Flashcard (22)
studied byStudied by 17 people
... ago
5.0(3)
flashcards Flashcard (75)
studied byStudied by 2 people
... ago
5.0(1)
flashcards Flashcard (29)
studied byStudied by 27 people
... ago
5.0(2)
flashcards Flashcard (40)
studied byStudied by 1 person
... ago
5.0(1)
flashcards Flashcard (20)
studied byStudied by 1 person
... ago
5.0(1)
flashcards Flashcard (134)
studied byStudied by 2615 people
... ago
4.0(26)
robot