Physics

Question 1

is speed vector or scalar

Answer 1

scalar

Question 2

is time vector or scalar

Answer 2

scalar

Question 3

is distance vector or scalar

Answer 3

scalar

Question 4

is displacement vector or scalar

Answer 4

vector

Question 5

is velocity vector or scalar

Answer 5

scalar

Question 6

is acceleration vector or scalar

Answer 6

vector

Question 7

is mass vector or scalar

Answer 7

scalar

Question 8

is energy vector or scalar

Answer 8

scalar

Question 9

what is a scalar quantity?

Answer 9

a physical quantity that can be described by a size only. The quantity has no direction

Question 10

what is a vector quantity?

Answer 10

a physical quantity that is described with both a size (magnitude) and direction.

Question 11

what is distance?

Answer 11

how far an object has travelled between two points

Question 12

what is displacement?

Answer 12

the change in position between two points

Question 13

what is the difference between distance and displacement?

Answer 13

The complete length of the path between any two points is called distance. Displacement is the direct length between any two points when measured along the minimum path between them

Question 14

what is speed?

Answer 14

the distance travelled per unit time

Question 15

state the formula for speed.

Answer 15

S=D/T

Question 16

what is velocity?

Answer 16

the change in displacement of an object per unit time

Question 17

state the formula for average velocity.

Answer 17

Vavg=Rf-Ri
Tf-Ti

Question 18

what do images equally spaced in a motion diagram indicate?

Answer 18

indicate that the object is travelling with constant speed.

Question 19

what do images with an increasing distance on a motion diagram indicate?

Answer 19

indicate that the object is speeding up.

Question 20

what do images with a decreasing distance on a motion diagram indicate?

Answer 20

indicate the object is slowing down.

Question 21

what does the gradient on a displacement time graph represent?

Answer 21

the gradient represents the average velocity.

Question 22

what does y2 indicate on a displacement time graph?

Answer 22

y2=Rf

Question 23

what does y1 indicate on a displacement time graph?

Answer 23

y1=Ri

Question 24

what does x2 indicate on a displacement time graph?

Answer 24

x2=Tf

Question 25

what does x1 indicate on a displacement time graph?

Answer 25

x1=Ti

Question 26

what equation can you use to find the average velocity on a displacement time graph?

Answer 26

y2-y1 x2-x1

Question 27

what is acceleration?

Answer 27

Acceleration is the change in velocity of an object per unit of time.

Question 28

state the formula for average acceleration.

Answer 28

Aavg=Vf-Vi

Question 29

What is another formula for acceleration?

Answer 29

v-u/t

Question 30

If a plane is landing south what is the direction its travelling in?

Answer 30

North

Question 31

How do you calculate velocity if you have acceleration and time?

Answer 31

v=u+at

Question 32

How do you calculate time if you have velocity and acceleration?

Answer 32

t=v-u/a

Question 33

Define mass

Answer 33

The quantity of matter/measurement of how much matter in an object

Question 34

Define force

Answer 34

A push, pull or twist that causes a mass to accelerate, change direction or change shape

Question 35

What are the four types of forces

Answer 35

Electromagnetic, weak nuclear, strong nuclear and gravity

Question 36

How do you calculate weight

Answer 36

W=mg

Question 37

How do you calculate mass?

Answer 37

m=w/g

Question 38

How do you calculate net forces

Answer 38

Start by defining a direction convention and then sum the forces together

Question 39

What is Newton’s first law?

Answer 39

An object at rest will stay at rest unless acted upon by an external unbalanced force. An object travelling at a Constant velocity will remain at a constant velocity unless acted upon by an external unbalanced force.

Question 40

Use Newtons first law in an example.

Answer 40

When a ball is stationary the two forces acting upon it at the support force and the weight force. The ball does not accelerate because the support force and the weight force at balanced. After being kicked the ball will continue to travel at a constant velocity unless acted upon by an external unbalanced force such as friction or air resistance causing it to slow down.

Question 41

What is Newton’s second law?

Answer 41

If there is a net force acting on an object the object will accelerate.

Question 42

Use Newton’s second law in an example.

Answer 42

When a player kicks a ball the kick provides the ball with a net force causing it to accelerate.

Question 43

if there is twice as much force on an object what happens?

Answer 43

There is twice the acceleration

Question 44

If there is twice as much force on twice the mass what happens?

Answer 44

The same acceleration

Question 45

What is the relationship between acceleration and net force?

Answer 45

They are proportional, so when the net force is doubled the acceleration is doubled

Question 46

What is the relationship between acceleration and mass?

Answer 46

They are inversely proportional, so when you double the mass the acceleration halves

Question 47

State Newton’s third law

Answer 47

If object an exerts a force onto object b object will with exert an equal force back onto object a in the opposite direction.

Question 48

Use Newton's third law in an example.

Answer 48

When a ball is kicked, the foot exerts a force onto the ball and the ball exerts a force back onto object a but in the opposite direction. The ball accelerates because it has less mass than the foot.

Question 49

What is potential energy?

Answer 49

The potential to cause change

Question 50

name two examples of Gravitational Potential Energy

Answer 50

holding an object above the ground, standing on a mountain

Question 51

name two examples of chemical potential energy

Answer 51

food, lighters

Question 52

name two examples of elastic potential energy

Answer 52

stretched rubber band, springs

Question 53

name two examples of nuclear energy

Answer 53

inside the nucleus of an atom, nuclear bombs

Question 54

name two examples of sound energy

Answer 54

talking, speakers

Question 55

name two examples of heat energy

Answer 55

fire, friction

Question 56

name two examples of light energy

Answer 56

lightbulbs, the sun

Question 57

name two examples of electrical energy

Answer 57

lightning, spark

Question 58

name two examples of kinetic energy

Answer 58

moving car, running

Question 59

What is the Law of Conservation of Energy?

Answer 59

Energy cannot be created nor destroyed, it can only be transmitted or transformed

Question 60

What is the formula for gravitational potential energy?

Answer 60

GPE=mgh

Question 61

what is the relationship between Kinetic Energy and Potential Energy?

Answer 61

They are proportional.