Units, Physical Quantities and Measurements; Vectors

Which of the following is a fundamental quantity?

• Speed

• Mass

• Density

• Acceleration

Which of the following is a derived quantity?

• Temperature

• Mass

• Length

• Velocity

Which of the following is a scalar quantity?

• Velocity

• Acceleration

• Energy

• Force

Which of the following is a vector quantity?

• Velocity

• Mass

• Energy

• Temperature

Which of the following is NOT the correct SI unit?

• mass : kg

• temperature : degrees Celsius

• length : m

• time : s

Which of the following statements is TRUE?

• Measurement is the process of comparison between an unknown quantity and a standard.

• Precision pertains to the degree of closeness to the true value.

• Accuracy pertains to the nearness of the measured values to each other.

• Errors are mistakes in the measuring process.

The standard mass of an unknown substance 15.6g. Which of the following sets of measurements has the most accurate average value?

• 
• 
• 
• 

A ⃗=3.0N, 150°, what is the x-component?

• -1.5

• 1.5

• -2.6

• 2.6

A ⃗=3.0N, 150°, what is the y-component?

• -1.5

• 1.5

• -2.6

• 2.6

A ⃗= B ⃗, True or False?

• True

• False