Motion

Question 1

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What is distance

Answer 1

Distance is how far we have travelled or moved.

Question 2

What is the SI unit for distance

Answer 2

s is quantity (in equations) and m is unit (answer)

Question 3

What is displacement

Answer 3

the quickest distance in a straight line to gte to destination

Question 4

What is the qauntity and unit symbol for displacement

Answer 4

Qauntity- s with arrow on top and SI unit is m but when si unit, always add direction

Question 5

First, the plane drops supplies to a town that is 40km to the east.

Next, the plane flies 30km north, to pick up some more supplies. They decide to stop there overnight.

What is the distance the plane has travelled from the start of its trip to the end location?

Answer 5

70 km (addition)

Question 6

First, the plane drops supplies to a town that is 40km to the east.

Next, the plane flies 30km north, to pick up some more supplies. They decide to stop there overnight.

What is the total displacement of the plane from base camp?

Answer 6

50km North east (Pythagoras theorem)

Question 7

What is speed

Answer 7

The measure of how fast something moves

Question 8

Speed SI units

Answer 8

quantitive= v and otherwise is ms-1 or m/s

Question 9

How do you convert from km/h to m/s

Answer 9

you multiply the km/h by 3.6 to get m/s, and you divide the m/s by 3.6 to get km/h

Question 10

A flight from Adelaide to Melbourne is 640 km and takes a commercial plane 1 hour and 15 minutes to complete. Calculate the speed of the plane as it flies.

Answer 10

142ms-1

Question 11

What is the average speed?

Answer 11

How fast something has travelled overall, ignoring changes in speed

Question 12

What is instantaneous speed?

Answer 12

Hoe fast something is traveling at a particular time

Question 13

A skydiver rode a hot air balloon upward a distance of 7000 m for 21 minutes, then jumped and fell for 2.0 minutes, then opened their parachute and drifted downward for 5.0 minutes before landing. Calculate the average speed for the entire trip.

Answer 13

8.3 ms-1

Question 14

What is velocity

Answer 14

It is a qauntity like speed that takes into account the direction of the motions

Question 15

SI units?

Answer 15

the symbol is v with an arrow on top and SI unit is ms-1 (always with direction at end)

Question 16

What is a distance time graph

Answer 16

It is a graph that shows how far an object travels as time progresses

Question 17

How to calculate average speed of a line on a distance graph?

Answer 17

slope=rise/ run
=y step/ x step
= y2-y1/x2-x1
=answer

Question 18

How to calculate instantaneous speed of an object

Answer 18

Only one digit
slope= rise/run
=y/x
=answer

Question 19

What does a displacement graph do?

Answer 19

Show how the position of the object changes compared to where it started

Question 20

How does a ticker timer work

Answer 20

it makes a mark at a frequency of 50 dots per second. The further away the dots, the fast the object is going.

Question 21

How to calculate the speed using ticker timer

Answer 21

Look at how many dots for certain length. Then times length until 50 dots every second

Question 22

What is acceleration?

Answer 22

The change in velocity over a period of time

Question 23

Acceleration unit?

Answer 23

symbol= a and si unit is metres per second per second (ms-2 or m/s2)

Question 24

Gravity is a form of?

Answer 24

Acceleration

Question 25

What is the acceleration of gravity

Answer 25

9.8 ms-2

Question 26

How do you calculate acceleration?

Answer 26

final speed- initial speed/ time taken

Question 27

A car starts at rest and speeds up to 56km/h in 7 seconds. Calculate its average acceleration in m/s/s:

Answer 27

2.22 m/s2

Question 28

What is a balanced force?

Answer 28

forces act on an object can be balanced or unbalanced- balanced forces cancel eachother out

Question 29

Unbalanced forces?

Answer 29

do not cancel eachother out and hence result in motion

Question 30

What is netwon's first law?

Answer 30

An object at rest will stay at rest and an object in motion will continue to move in its current state f motion unless acted upon by an unbalanced force

Question 31

What is interia?

Answer 31

Inertia is a property of matter where it resut a change in state of motion unless acted upon by an unbalanced force =

Question 32

The amount of intertia an object has is...

Answer 32

Dependent on it's mass

Question 33

What is newton's second law?

Answer 33

Newton’s Second Law states that the acceleration of an object is directly proportional to the force applied, and inversely proportional to the mass of the object.

Question 34

Formula for second law

Answer 34

F=ma Force= acceleration*mass

Question 35

If the net force is zero....

Answer 35

The object will remain in its current state of motion

Question 36

A 41,000kg plane experiences a forward thrust force of 7000N and a backward drag force of 800N. Calculate the net force acting on the plane.

Answer 36

6200 N

Question 37

A 41,000kg plane experiences a forward thrust force of 7000N and a backward drag force of 800N. Hence calculate the acceleration of the plane.

Answer 37

0.15ms-2

Question 38

Mass SI unit

Answer 38

kg or m

Question 39

Force SI unit

Answer 39

N (newtons) or F

Question 40

Newton’s Third Law

Answer 40

Newton’s Third Law states that every action force has an equal and opposite reaction force.