HP Unit 01 - Introduction to Physics

HP Unit 01 - Introduction to Physics

Module 1-1: Scientific Method and Measurement

• The scientific method is the process used by scientists to acquire new knowledge and improve our understanding of the universe.

• Physicists throughout the world use the International System of Units (also called the SI system).

Multiple Choice

A testable explanation to a problem that has not yet been tested. 

• data
• theory
• hypothesis
• fact

Multiple Choice

This variable in an experiment is the one being changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

Multiple Choice

Dependent variable means

• the scientist controls what to test
• educated guess
• ask a question
• what is being measured

Multiple Choice

What SI unit is used to measure length?

• meters

• liters

• centimeters

• kilograms

Multiple Choice

What is the correct SI unit for mass?

• Kilograms
• newtons
• pounds
• grams

Module 1-2: Math Tools and Vector Components

• A number is expressed in scientific notation by moving the decimal so that exactly one non-zero digit is on the left of the decimal and the exponent of 10 will be the number of places the decimal was moved. 

Multiple Choice

The rule of scientific notation is to write all exponents with a base of ____.

• 50

• 5

• 100

• 10

Multiple Choice

How would you write 564,000,000 in scientific notation?

• 5.64 x 10^-7
• 5.64 x 10⁶
• 5.64 x 10⁸
• 56.4 x 10⁷

Multiple Choice

Convert this number into scientific notation: 0.068

• 6.9 x 10⁶

• 6.8 x 10^-9

• 6.8 x 10^-2

• None of the above

Multiple Choice

How many significant figures: 2016 m

• 1
• 2
• 3
• 4

Multiple Choice

How many significant figures: 0.012 km

• 1

• 2

• 3

• 4

Multiple Choice

How many significant figures: 0.012 km

• 1
• 2
• 3
• 4

Module 1-3: Vector Addition and Graphical Methods

• The graphical process for adding vectors in two dimensions is to place the tail of the second vector on the arrow head of the first vector.

• The sum of the two vectors is the vector that begins at the origin of the first vector and goes to the ending of the second vector.

Multiple Choice

How do you combine vectors if they are at a right angle to each other, and you know two sides?

• Multiply

• Divide

• Pythagorean Theorem

• Use trigonometry

Multiple Choice

The side of the right triangle of length A is __________ to angle α

• adjacent

• opposite

• hypotenuse

• inverse

Multiple Choice

The side of the right triangle of length B is called __________ to angle α

• adjacent

• opposite

• hypotenuse

• inverse

Multiple Choice

A resultant vector is

• equal to the sum of one vector.

• equal to the sum of two or more vectors.

• equal to the difference of one vector.

Multiple Choice

What is the magnitude of the resultant vector, r?

• 3

• 4

• 5

• 7