A sledge is pulled in a straight line by dogs, as shown. The dogs produce a total horizontal driving force of 600 N. The frictional force between the sledge and the surface is 150 N and the air resistance on the sledge is 450 N. What is the resultant force acting on the sledge

F = 0 N

Explanation:

The direction of air resistance and frictional force will be same and opposite to the direction of the driving fore of dogs. Therefore, the resultant force can be given as follows:

here,

driving force of dogs = 600 N

Frictional Force = 150 N

Resultant Force = 450 N

Therefore,

F = 0 N

the part of the wave he is travelling on is the crest