I don't know this 1 I'm sorry I can't help you
Answer:
a.
b.1058 N
Explanation:
We are given that
Mass of each dog,M=18.5 kg
Mass of sled with rider,m=250 kg
a.Average force,F=185 N


By Newton's second law



b.By Newton's second law

Substitute the values

Hence, the force in the coupling between the dogs and the sled=1058 N
Answer:
b. add a magnetic metal core
Explanation:
a p e x test
B. Yard
the other answers C. & D. are metric A is a unit of temperature