P8 - Forces

Question 1

displacement

Answer 1

-distance without change of direction from the start point

Question 2

vectors

Answer 2

A quantity with both magnitude and direction

Question 3

3 tyes of vecotors

Answer 3

displacment
velocity
weight

Question 4

scalar

Answer 4

a quantity with mgnitude only

Question 5

eg of scalars (4)`

Answer 5

-speed
-distance
-time
-mass

Question 6

magnitude

Answer 6

extent size or amount of somthing

Question 7

simply what is a vector

Answer 7

magnitude + direction

Question 8

simply what is a scalar quantities

Answer 8

magnitude

Question 9

what does a arrow in vector represent

Answer 9

direction shows direction
-size of arrow shows the magnitude

Question 10

how can a vector quantities be represented

Answer 10

by an arrow

Question 11

force

Answer 11

push or pull that acts on an object due to its interaction with another object

Question 12

how can a force impact an object

Answer 12

changing their speed
changing their direction
changing their shape

Question 13

what are the 8 forces to be farmiliar with
Rember eunomic
Wat

Answer 13

• W eight
• A ir resitance (drag)
• T ension
• E lectrostatic force
• R eaction force
  .
• C ompression
• U pthrust
• T hrust

Question 14

what is air resistance and thrust think of example they both encorperated

Answer 14

Thrust – the force causing an object to move (such as the force from a rocket engine)
Air resistance (or drag) – the friction of the air on a moving object

Question 15

what is Upthrust and weight and think of an example where they work toghether

Answer 15

Upthrust – the force of a fluid (such as water) pushing an object upwards (making it float)
Weight – the name given to the force of gravity on a mass

Question 16

what is electrostatic force

Answer 16

force acting between two charged particles

Question 17

what is compression think of an example

Answer 17

Compression – forces that act inward on an object, squeezing it

Question 18

what is tension think of an example

Answer 18

Tension – force transmitted through a cable or a string when pulled on by forces acting on its opposite ends

Question 19

what is a reaction force

Answer 19

A force due to contact between two objects

Question 20

contact forces give example

Answer 20

A force which acts between objects that are physically touching
-friction ( when two object rub against each other )
- air resistace (object moving through air )

Question 21

What is a non contact force

Answer 21

A force which acts at a distance, without any contact between bodies, due to the action of a field

Question 22

non contact forces examples

Answer 22

• magnetic force ( magnetic poles that can be attractive or repulsive )

-electrostatic force ( charged objects which can be attractive or repulsive )

Question 23

what is a force pair

Answer 23

the interaction of two objects when force exerted on one object by another

Question 24

what is weight

Answer 24

The force acting on an object due to gravitational attraction

Question 25

what happens as a result of a gravitational field

Answer 25

Objects stay firmly on the ground Objects will always fall to the ground Satellites are kept in orbit

Question 26

what instruments can we use to meausre weight

Answer 26

- can use top pan balance to find mass then weight found inderectly thorugh calculation - newton meter like weighing scale which measures force in newtons consists of hook and spring

Question 27

what is the center of mass of an object

Answer 27

the point which the weight of an object acts | can be found throguh symmetry

Question 28

how can you find the center of mass on an iregular object

Answer 28

Locate its balance point ## Footnote broomstick has a centre of mass slightly closer to the head of the broom since there is more mass located there

Question 29

what is the difference between mass and weight

Answer 29

a mass remians the same however the weight will differ depengin on the strength of the gravitational filed on different planets.

Question 30

how does Gravitational field strength relate to planet size

Answer 30

the larger the planet the bigger the Gravitational field strength

Question 31

Newton's 3rd law of motion

Answer 31

-when 2 objects interact, -they must exert equal and opposite forces on each other

Question 32

driving force

Answer 32

The force which causes object to move or keep moving

Question 33

resultant force

Answer 33

a single force that describes all of the forces operating on a body

Question 34

how to determine the resultant force

Answer 34

when many forces applied to an object they can be combined or added to produce a final force

Question 35

what does resulatant force tell us

Answer 35

the direction the object will move as a result of all forces and the magnitude of teh final force

Question 36

what two types can forces combine to be

Answer 36

balanced forces unbalanced forces

Question 37

what is another way of saying teh resualtant force

Answer 37

Net force

Question 38

if resultant is 0 then give example

Answer 38

forces are balanced book resting on table forces equal

Question 39

What if forces are unbalenced give example

Answer 39

forces combined in such a way that they do not cancel out tug of war

Question 40

How to work out resultant force

Answer 40

-calculate difference of all acting forces

Question 41

Newton's 1st law of motion

Answer 41

An object will remain at rest or move at constant velocity unless acted on by a resultant (unbalanced) force

Question 42

Impact of newtons 1st law of motion

Answer 42

-stationary = stays at rest -moving = constant speed and same direction

Question 43

when resultant force is not 0

Answer 43

-movement depends on size and direction

Question 44

What is the overall force when two opposite forces are not equal

Answer 44

-size the difference between the two forces The direction based of larger force

Question 45

free body force diagram

Answer 45

A diagram showing all the forces acting on an object, drawn as arrows from a single point, labelled with their size and direction.SS | this is an example

Question 46

what does tension allways act away from

Answer 46

always acts away from from the mass

Question 47

if a force acts upon an angle what might happen

Answer 47

the force may be broken down or resolved into two components | single force into two perpendicular components ## Footnote A horizontal component A vertical component

Question 48

what might a resultant force diagram end up lookin like

Answer 48