Question

part a
find the power required to give a brick 80 j of potential energy in a time of 1.8 s
express your answer to two significant figures and include the appropriate units.
p = value units

Explanation:

Step1: Identify values

Given $W = 80\ J$ and $t=1.8\ s$.

Step2: Apply power formula

$P=\frac{W}{t}=\frac{80}{1.8}\ W$.

Step3: Calculate and round

$P=\frac{80}{1.8}\approx44.44\ W$. Rounding to two - significant figures gives $P = 44\ W$.

Answer:

$44\ W$