Substituting into Equations:
Substitute means replacing a letter with a numerical value. This can be in a formulae and expressions, including scientific formula.
Given that v = u + at,
find v when t = 1, a = 2 and u = 7;
v = 7 + 2 × 1 = 9
Q. Calculate v = √(u² + 2as)
with u = 2.1, s = 0.18, a = –9.8
Give you answer to 2 d.p.