Answer:
17.2s
Step-by-step 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=
By using the formula
Energy expended by Georgie=
Power=150 W
We know that
Power=
By using the formula
Time=
Hence, the time for which glow to produce the 2576J =17.2s