Question:
A boy is of mass 40 kg. I f he pulls of gravity on 1 kg on the surface on earth is 9.8 N and at the surface of moon is 1.6 N. Find (a) weight of boy at earth, (b) mass and weight of the boy at the moon surface
Answer:
Weight = mass×gravitational acceleration
Mass of boy is 40 kg.
Gravitational acceleration on surface of earth= g=9.8 m/sec2
Weight of boy on earth= 40×9.8 =392 N
Gravitational acceleration on surface of moon= 1.6
Weight of boy on moon= 40×1.6= 64 N
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