Motion, Force and Energy

Summary thus far

By Maria Woodbury

Vectors and Scalars

Vectors have direction and magnitude
Scalars only have magnitude

Categorize

Options (16)

force

velocity

acceleration

displacement

momentum

gravity

electric field

magnetic field

temperature

mass

time

length

energy

speed

volume

density

Place the following into their proper category

Vector

Scalar

Vectors are used to determine the resultant direction and magnitude of an object's motion

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Some vector diagrams are a little more complicated. If this is the case, chances are you will need-
Pythagoras' Theorem
and or Trigonometry.
You might even need to resolve them into components

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Match

Match the resultant forces with the question

• (a)

• (b)

• (c)

30N to the right

20N to the right

0 N

• 30N to the right

• 20N to the right

• 0 N

Multiple Choice

A plane is flying due north at a speed of 400km/h. A cross wind blows from the east at 300km/h to the west. What is the resultant speed and direction of the plane?

• 500 km/h

  at N 36.87 W

• 400 km/h directly north
• 600 km/h at N 30 W

• 450 km/h at N 45 E

Motion

Match

Match the letter with the physical quantity it represents

• v

• u

• s

• a

• t

final velocity

initial velocity

displacement

acceleration

time

• final velocity

• initial velocity

• displacement

• acceleration

• time

Match

Match the units of measure to the quantity

• speed

• distance

• acceleration

• time

• force

m/s

m

m/s²

s

N

• m/s

• m

• m/s²

• s

• N

Force

There are three Laws of Motion:
1st Law: an object will remain at rest or constant speed unless an external force acts upon it
2nd Law: the force an objct experiences is proportional to the acceleration (F = m x a)
3rd Law: Every action has an equal and opposite reaction

Categorize

Options (3)

experienced when accelerating

a big truck will have a greater force than a car that has the same acceleration

rockets launching

Which scenario matches which law?

1st Law

2nd Law

3rd Law

​Energy

There are many different types of energy, but the ones we will be focusing on is potential and kinetic energy
Potential energy is stored energy- it can be stored as a result of being elevated
Kinetic energy is energy of motion

Match

Match the formula with the quantity

• Force

• Kinetic Energy

• Potential Energy

• Acceleration

• $$=ma$$

• $$=\frac{1}{2}mv^2$$

• $$=mgh$$

• $$=\frac{v-u}{t}$$

When travelling in a roller coaster, the total energy stays the same, but what varies is the potential and kinetic energy. At point 3, the trolley has maximum KE, at point 5, the trolley has maximum PE.

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Poll

So far I am finding physics

• difficult because of the maths

• challenging, but I am up for the challenge

• interesting but the maths is too much

• boring

• interesting, but I just need a little help with the maths

Assessment Task 3

​Designing a Play Park

In groups of no more than 4, your task will be to design a fun park that contains several rides demonstrating the different concepts we have studied thus far. Your model can be NO MORE than 50cm x 50cm x 50cm in dimensions.

You must include:
-at least 3 rides
-at least 3 different calculations involving force, energy and speed which are included in the information sheet attached to your model
Your design should be well presented, appealing and demonstrating effort

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Marks will be awarded for
-meeting the criteria of at least 3 rides and 3 calculations
-meeting the size requirements and presentation of the final product
-creativity and effort
-use of time and teamwork

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