Chapter 1

In mechanics, physicists use three basic quantities to derive additional quantities. Mass is one of the three quantities. What are the other two?

• Time and weight

• Time and length

• Length and weight

• Energy and current

Which of the following prefixes are represents abbreviated p, n, and G?

• 10^-2, 10^-6, and 10¹⁵

• 10^-9, 10⁶, and 10¹⁰

• 10^-12, 10^-9, and 10⁹

• 10^-15, 10^-6, and 10¹²

Which of the following pairs of physical quantities is composed of one vector and one scalar?

• Force

• Acceleration

• Energy

• Distance

Which formula is dimensionally consistent with an expression yielding a value for velocity? (a is acceleration, x is distance, and t is time)

• v/t²

• vx²

• v²/t

• at

If the displacement of an object, x, is related to velocity, v, according to the relation x = Av. The constant, A, has the dimension of?

• acceleration

• length

• time

• area