Answer:
166.284 KJ
Step-by-step explanation:
We are given that
Mass of sled =70.9 kg
Displacement of sled=1.24 km
Coefficient of friction=[tex]\mu=[/tex]0.193
Acceleration due to gravity=[tex]g=9.8m/s^2[/tex]
We have to find the work done by the dogs in units KJ
Friction force=[tex]\mu mg[/tex]
Friction force =f=[tex]0.193\times 70.9\times 9.8=134.1N[/tex]
Force applied by team of dogs=Friction force
F=f=134.1 N
Work done=[tex]F\times s[/tex]
We have s=1.24 km=[tex]1.24\times 1000=1240m[/tex]
1 km= 1000 m
Work done=[tex]134.1\times 1240=166284 J[/tex]
1 KJ=1000J
Work done=[tex]\frac{166284}{1000}=166.284KJ[/tex]
Hence, the work done by the dogs=166.284 KJ
