Question

a sled that weighs is pulled across level snow by dogs exerting a horizontal force on it. the coefficient of kinetic friction between the sled and snow is . how much work is done by the dogs on the sled when the sled moves at constant speed?

Answer 1

The amount of work done by the dog team in pulling the sled 1000 m at constant speed is 250000 J

How to calculate the work done by the dog team?

First, we shall calculate the force used in pulling the sled. Details below:

Weight of sled = 5000 N

• Normal reaction (N) = Weight of sled = 5000 N
• Coefficient of friction (μ) = 0.05
• Force of pull (F) =?

F = μN

= 0.05 × 5000

= 250 N

Now, we shall calculate the work done by the dog team. This is shown below:

• Force of pull (F) = 250 N
• Distance (d) = 1000 m
• Work done =?

Work done = force (F) × distance (d)

= 250 × 1000

= 250000 J

Thus, the work done by the dog team is 250000 J

Complete question:

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