Using the Science Formula PageAnd

Calculator Help

The Formula Chart for Science

On the science chart, the meanings of the letters in the formulas are given to you.

You must know the measurement units to know what numbers fit to which letter.

The box at the bottom provides some help . . . Let’s look.

When you don’t know – look!

Very important information is here.

Example: Newton which is the unit of Force is found by multiplying kg (mass) times m/s2

which is the unit for acceleration.

What is the net force exerted on a 90.0 kg race-car driver while the race car is accelerating from 0 to 44.7 m/s in 4.50 s?

F 9.8 NG 20 NH 201 NJ 894 N

We see kg, but not m/s2, so we have to calculate acceleration first . .

Acceleration = Vf – Vi time

A = 44.7 – 0 = 9.9 m/s2

4.5 So F = 90.0kg x 9.9 m/s2 = 893.9 N

Example:

Science questions some times give more information than is needed. Match units to formulas on the formula

page. Time should be in seconds in all formulas. Mass must be in Kilograms for Force,

Momentum, Work and Power. Work and energy must be in Joules or

Newton-meters. This can be overwhelming if you try to wait

until the day before to learn them. Try flash cards with units and what they measure.

A person pushes a large box across a level floor by applying a horizontal force of 200 N. If the person pushes the box a distance of 5 meters in 10 seconds, how much work does the person do on the box?

A 2000 joulesB 1000 joulesC 400 joulesD 100 joules

In problems with numbers;

1) find the question word,

2) look up the formula on the formula page,

3) Cross out information you do not need

4) put the numbers in the CALCULATOR in order.

Work = force x distance

No mention of time!

or 200N x 5 m = 1000 joules

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Let’s look at some related formulas . . .

The bottom equation says Speed, but uses v in the equation.

According to the top formula, v means velocity.

Velocity is more accurate since it is speed in one direction.

On TAKS these words are used interchangeably.

Momentum = mv so . . .

3 Which bike rider has the greatest momentum?

A A 40 kg person riding at 45 km/hB A 50 kg person riding at 35 km/hC A 60 kg person riding at 25 km/hD A 70 kg person riding at 15 km/h

Just like on the Math test, plug in each answer and see which one works (it is the largest). . .

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Most important . . .

Do not guess, look and calculate!!