Forward force by ninety-five oarsmen is 19000 N and backward force by five oarsmen is 1000 N. Subtracting opposing forces gives an unbalanced forward net force of 18000 N acting on the boat.
While practising for the snake boat race (Vallum kalli in Kerala), 100 oarsmen are rowing a boat together. Out of these, 95 row backwards to propel the boat forward. But by mistake, 5 oarsmen row in the opposite direction. If each oarsman applies a horizontal force of 200 N, what is the net force on the snake boat? (Ignore drag forces, air friction, etc.)
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Each oarsman exerts a horizontal force of 200 N. The 95 oarsmen rowing to push the boat forward provide 95 multiplied by 200 N, equaling 19000 N forward force. The 5 oarsmen rowing backward provide 5 multiplied by 200 N, equaling 1000 N opposing force. The resulting net force on the snake boat is 19000 N minus 1000 N, which equals 18000 N in the forward direction.
For more NCERT Solutions of Class 9 Science Exploration Chapter 6 How Forces Affect Motion Question Answer (2026-27)
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