Question

The work a 300 W electric grinder can do in 5.0 min is:

a) 1 kJ
b) 1.5 kJ
c) 25 kJ
d) 90 kJ

Answer 1

The work done by the 300 W electric grinder in 5.0 min is 90 kJ.

Step-by-step explanation:

To find the work done by the electric grinder, we can use the formula Work = Power × Time. In this case, the power is 300 W and the time is 5.0 min (or 300 s). So, the work done is:

Work = 300 W × 300 s = 90,000 J = 90 kJ

Therefore, the correct answer is option d) 90 kJ.