Answer:
40 seconds
Explanation:
Power is defined as the rate of work done per unit time, expressed as [tex]P=\frac {W}{t}[/tex] where P represent power in Watts, W is work done in Joules and t is time taken. Making t the subject of the above formula then [tex]t=\frac {W}{P}[/tex] and substituting Work done, W with 1600 J while Power, P with 40 W then [tex]t=\frac {1600}{40}=40s[/tex]
Therefore, the time taken is equivalent to 40 s
