Find the net force including its direction when each force acts in the direction indicated.
1. 17.0 N to the left, 20.0 N to the right.
2. 265 N to the left, 85 N to the right.
3. 100.0 N to the left, 75.0 N to the right, and 10.0 N to the right.
4. 190 lb to the left, 87 lb to the right, and 49 lb to the right.
5. 346 N to the right, 247 N to the left, and 103 N to the left.
6. 37 N to the right, 24 N to the left, 65 N to the right, and 85 N to the right.
7. Find the acceleration of an automobile of mass 100 slugs acted upon by a driving force of 500 lb that is opposed by a frictional force of 100 lb (Fig.5.9).

100 lb 500 lb