Question

A horse pulls a child on a sled along a horizontal snow-covered trail using a rope. The horse does 8.0x10^3J of work as it pulls the child and sled 62m at a constant speed. The coefficient of friction between the sled and the snow is 0.25.

A) Find the tension in the rope


B) Find the combined mass of the child and the sled

Answer 1

Does your textbook give the mass of the sled?

Answer 2

W(horse) =W(fr) =μNs= μmgs
m=W/ μ gs= 8000/0.25•9.8•62=52.7 kg
If the rope is horizontal and
v=const =>
T= F(fr) = μmg=0.25•52.7•9.8 =129 N

Answer 3

Thanks ^^