important success criteria

Question 1

what is scalar quantity?

Answer 1

is described by magnitude (mass, speed)

Question 2

what is vector quantity?

Answer 2

it requires both magnitude + direction (velocity, force, displacement)

Question 2

what is magnitude?

Answer 2

size/amount/ quantity

Question 3

what is distance?

Answer 3

the total length of the path an object has travelled

Question 4

what is displacement?

Answer 4

an objects change in position between final and initial velocity

Question 5

what are the units displacement is measured in?

Answer 5

x and in length, like m or km

Question 6

what are the units distance is measured in?

Answer 6

d and length, like m or km

Question 7

what is speed?

Answer 7

the rate that an object changes

Question 8

what is velocity?

Answer 8

the speed with direction

Question 9

what is the unit speed is measured with?

Answer 9

s

Question 10

what are the units velocity is measured with?

Answer 10

m/s and v

Question 11

is distance scalar or vector, why?

Answer 11

scalar. only describes amount of space between 2 points and no direction

Question 12

is displacement scalar or vector, why?

Answer 12

vector. requires both magnitude + direction

Question 13

is speed scalar or vector, why?

Answer 13

scalar. only describes how fast with no direction

Question 14

is velocity scalar or vector, why?

Answer 14

vector. requires both magnitude + direction

Question 15

how do you convert m/s to km/h?

Answer 15

multiply by 3.6

Question 16

how do you calculate average speed?

Answer 16

A= total distance
total time

Question 17

how do you calculate distance?

Answer 17

speed x time

Question 18

how do you calculate time?

Answer 18

distance divided by speed

Question 19

how do you calculate speed?

Answer 19

distance divided by time

Question 20

what is acceleration?

Answer 20

rate when velocity changes in time, regarding speed + direction

Question 21

is acceleration scalar or vector?

Answer 21

vector. needs both magnitude + direction

Question 22

what are the units used for acceleration?

Answer 22

a and m/s

Question 23

what are the units used for initial velocity?

Answer 23

u and m/s

Question 24

what are the units used for final velocity?

Answer 24

v and m/s

Question 25

how do you calculate acceleration in a straight line?

Answer 25

a = v - u t

Question 26

what is acceleration due to gravity?

Answer 26

the acceleration experienced by an object due to gravitational pull. Always directed downwards

Question 27

what is earth's formula regarding gravity?

Answer 27

9.8m/s squared

Question 28

how do you know when velocity = 0?

Answer 28

when it starts from rest, or is at it's highest point in vertical motion

Question 29

what is the initial' velocity symbol?

Answer 29

Vo

Question 30

what is the final velocity symbol?

Answer 30

V

Question 31

explain velocity = 0

Answer 31

Vo= 0 m/s- before acceleration/ motion happens V= 0 m/s after motion/ acceleration

Question 32

What is the name of Newton's first law?

Answer 32

Interia law

Question 33

What is the name of Newton's second law?

Answer 33

acceleration law

Question 34

What is the name of Newton's third law?

Answer 34

action-reaction law

Question 35

Explain newtons first law

Answer 35

object at rest stays at rest, object in motion stays in motion (at constant velocity) unless acted upon by a force. Things don't move on their own, something needs to physically change it

Question 36

Explain newtons second law

Answer 36

the acceleration of an object depends on amount of forces acting on it and its mass. F = m x a more force = more acceleration more mass = less acceleration (harder to move)

Question 37

Explain newtons third law

Answer 37

for every action, there is an equal and opposite reaction. forces always come in pairs. push something, it pushes back with same force