A boy of mass 40kg runs up a height of 30steps each 20cm high. Find the force of gravity acting on the body and the work done by the boy against gravity.

A boy of mass 40kg runs up a height of 30steps each 20cm high. Find th

1.	A boy of mass 40kg runs up a height of 30steps each 20cm high. Find the force of gravity acting on the body and the work done by the boy against gravity.
Answer» -A boy of mass 40kg runs up a height of 30steps each 20cm high.To FIND :-Find the force of gravity acting on the body and the work DONE by the boy against gravity.Solution :-TOTAL distance covered = Total steps × Height of eacj step⇒ 30 × 20⇒ 600 CMAS 1 m = 100 cm600 cm = 600/100 = 6 m (i) ForceForce = Mass × AccelerationForce = 40 × 9.8Force = 392 N(ii) Work doneWork done = Force × DistanceWork done = 392 × 6Work done = 2352 J

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A boy of mass 40kg runs up a height of 30steps each 20cm high. Find the force of gravity acting on the body and the work done by the boy against gravity.

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