Answer:
17.2s
Explanation:
We are given that
Mass of Georgie's brother=28kg
Mass of sled=9.1Kg
Total mass pulled by Georgie=28+9.1=37.1 Kg
Force applied =F=23N
Displacement=s=
Work done=[tex]F\times s[/tex]
By using the formula
Energy expended by Georgie=[tex]23\times 112=2576J[/tex]
Power=150 W
We know that
Power=[tex]\frac{work\;done}{time}[/tex]
[tex]Time=\frac{work\;done}{power}[/tex]
By using the formula
Time=[tex]\frac{2576}{150}=17.2 s[/tex]
Hence, the time for which glow to produce the 2576J =17.2s
