Chapter 1-4: Scientific Notation, SI Units, Average Velocity, Average Acceleration

Physics

It is a study of natural phenomena.

Physics

It deals with quantity with direction.

Units

These are labels that provide meaning; fundamental of measurements

A way to write very large or very small numbers so they are easier to read, compare, and calculate with in science. It uses powers of 10 to show how many times the number is multiplied or divided by 10.

What is scientific notation?

Scientific notation format

coefficient/number between 1 and 10

In the formula, a is the ?

many places the decimal moved

In the formula, n tells how?

Number is large and moves to the right

What does a positive n exponent mean?

Number is small and moves to the left

What does a negative n exponent mean?

number of decimals moved

The exponent is equals to the?

4,500

They are the standard measurement units used worldwide in science so everyone measures things the same way.

What are SI units?

To make sure all values are in the same unit before using formulas, so answers are correct.

Why do we convert units?

meter (m)

Base Unit – Length

second (s)

Base Unit – Time

kilogram (kg)

Base Unit – Mass

mm, cm, dcm, m, dkm, hm, km

It is the order of length quanties from the reference point of meter (1m)

1 km

1000 m

1 hm

100 m

1 dm

10 m

1 m

m

1 dcm

0.1 m

1 cm

0.01 m

1 mm

0.001 m

1 year

365 days

1 month

4 weeks

1 week

7 days

1 day

24 hours

1 hour

60 mins

1 mins

60 seconds

1 mile

1609 meters

1 feet

0.3048 meters

1 lb

0.4536 kg

1 mph

0.447 m/s

1 inch

2.54 cm

What is a derived unit?

A unit made from combining base units (e.g., m/s, m/s²).

meters per second (m/s)

SI unit for velocity

meters per second squared (m/s²)

SI unit for acceleration

Distance

It has no reference point.

Zero

It is the reference point in a number line.

Position/Location

It needs a reference point to be determined.

Number Scale

It dictates your exact positions or quantity.

Scalar, Vector

Two of way of measuring quantity.

Scalar

It consists of a magnitude or size. Example: cm, kg, hm.

Vector

It consists of a magnitude and direction. Example: 60 m/s NORTH

Distance

It states how far.

Time

It states how fast.

Displacement

It covers a change in position and time. It is represented by delta d.

Displacement

It is equal to d₂ - d₁

Time Interval

It pertains to the change in time. It is represented by Delta t.

Displacement

It is equal to t₂ - t₁

Average Velocity Formula

It is equal to: d₂ - d₁ / t₂ - t₁ or Δd / Δt

d₂ - d₁ / t₂ - t₁ or Δd / Δt

Average Velocity Formula

Acceleration

It is the change in velocity of an object moving over increasing or decreasing distances.

Acceleration Formula

It is equal to: Δv / Δt or v₂ - v₁ / t₂ - t₁