Question

consider a rain drop of mass 1.00 g falling from a height of 1000 m .it Hits the ground with the speed of 40 m/ s . (1) what is the work done by the gravitational force? (2) what is the work done by the unknown force?​

Answer 1

Explanation:

Workdone by gravitational force is loss of potential energy = mgh = 1 x 10-³× 10 × 1000 = 10J

Loss of potential energy =gain in kinetic energy + workdone by resistive force

Gain in K.E= ½mv² = ½ x 10-³ x 40 x 40 = 0.8J

Work Done by resistive force= 10 – 0.8 = 9.2J

Answer 2

Answer:

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