Question

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Answer 1

Explanation:

For 4 kg body

Net Force = 30 - 10 = 20 N

Direction = Right

For 40 kg body

Net force = 140 + 180 = 320 N

Direction = Right

For 100 kg body

Net force = 200 - 30 = 170 N

Direction = Right

Note:

1. Net force is equal to the difference of of the greater force and the lesser force if the forces are acting in opposite direction

2. net force is equal to the sum of the the all forces acting on the body if the forces acting on a body are in same direction