Physics Girl Trigonometry and Vectors Quiz

What is the main focus of the video presented by Dianna from Physics Girl?

• A discussion on classical mechanics

• An introduction to quantum mechanics

• A quick refresher on trigonometry and vectors

• A deep dive into calculus

Which of the following best describes a vector?

• A mathematical constant

• A unitless number

• A representation of a measurement with magnitude and direction

• A scalar quantity with only magnitude

In a right triangle, what is the term for the side opposite the angle theta?

• Adjacent side

• Hypotenuse

• Opposite side

• Base

What is the mnemonic used to remember the trigonometric ratios?

• FOIL

• SOHCAHTOA

• PEMDAS

• BODMAS

If you are swimming at an angle of 37 degrees north of east with a speed of 10, which trigonometric function helps find the eastward component?

• Cosine

• Sine

• Tangent

• Secant

What is the cosine of 30 degrees?

• 1/2

• 0

• √3/2

• √2/2

Which angle corresponds to a sine value of 1?

• 0 degrees

• 30 degrees

• 90 degrees

• 60 degrees

What is the sine of 45 degrees?

• 1

• √3/2

• 1/2

• √2/2

In the final example, what is the force in the x direction when the dog pulls with a force of 20 newtons at an angle of 30 degrees?

• 20 newtons

• 17 newtons

• 15 newtons

• 10 newtons

What is the downward force when the dog pulls with a force of 20 newtons at an angle of 30 degrees?

• 15 newtons

• 10 newtons

• 20 newtons

• 5 newtons