a 5,400 w motor is used to do work. if the motor is used for 640 s, about how much work could it do?\n8.4…

a 5,400 w motor is used to do work. if the motor is used for 640 s, about how much work could it do?\n8.4 j\n4,800 j\n6,000 j\n3,500,000 j

a 5,400 w motor is used to do work. if the motor is used for 640 s, about how much work could it do?\n8.4 j\n4,800 j\n6,000 j\n3,500,000 j

Answer

Explanation:

Step1: Recall work - power formula

The formula for power is $P=\frac{W}{t}$, where $P$ is power, $W$ is work, and $t$ is time. We can re - arrange it to solve for work: $W = P\times t$.

Step2: Substitute given values

Given that $P = 5400\ W$ and $t=640\ s$. Then $W=5400\times640$. $W = 5400\times640=3456000\ J\approx3500000\ J$

Answer:

D. 3,500,000 J