Question

if a machine has a power of 25 watts using 5000 joules of energy, how much time does this take to happen? 125 s 0.0005 s 200 sec 125000 s

Explanation:

Step1: Recall power formula

Power $P=\frac{W}{t}$, where $P$ is power, $W$ is work - energy, and $t$ is time. We need to solve for $t$.

Step2: Rearrange the formula for $t$

$t = \frac{W}{P}$

Step3: Substitute given values

Given $W = 5000$ joules and $P=25$ watts. Then $t=\frac{5000}{25}$

Step4: Calculate the result

$t = 200$ s

Answer:

C. 200 sec