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?
0N
2 )
300N
3 )
900N
4 )
1200N
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