Question

In Emily's physics class, she had to solve the equation 9 = 12at2 + ut for u. Each step of her work is shown below.

Answer 1

Answer:

$u=(9-\frac{1}{2}at^{2})/t$

Step-by-step explanation:

we have

$9=\frac{1}{2}at^{2}+ut$

Solve for u

That means-------> isolate the variable u

step 1

Subtract  $\frac{1}{2}at^{2}$ both sides

$9-\frac{1}{2}at^{2}=ut$

step 2

Divide by  $t$ both sides

$u=(9-\frac{1}{2}at^{2})/t$

Answer 2

Answer:

The formula for u is $u=\frac{9-\frac{1}{2}at^2}{t}$.

Step-by-step explanation:

The given equation is

$9=\frac{1}{2}at^2+ut$

Step 1: Subtract $\frac{1}{2}at^2$ from both the sides.

$9-\frac{1}{2}at^2=ut$

Step 2: Divide both sides by t.

$\frac{9-\frac{1}{2}at^2}{t}=u$

Therefore the formula for u is $u=\frac{9-\frac{1}{2}at^2}{t}$.