Lesson: Rearranging Formulas for Physical Quantities Physics • 9th Grade

In this lesson, we will learn how to change the subject of a formula and recognise valid rearrangements of combinations of formulas.

Lesson Plan

Students will be able to

change the subject of a formula,
substitute a formula for a term in another formula,
simplify a formula.

Lesson Video

Lesson Playlist

05:27
04:54
03:27

Lesson Worksheet

Q1:

One side of the formula is . The formula is rearranged so that one side of the formula is equal to . Which of the following is the other side of the formula equal to?

Q2:

Kinetic energy is given by the formula . The weight, , of an object is . Which of the following is a correct formula that has a subject equal to the ratio of the kinetic energy of an object to its weight?

Q3:

The subject of the formula force = mass acceleration is force. Which of the following correctly shows the same formula with acceleration as the subject of the formula?