a ball of mass 100g and 250g are thrown upward which will return first and why?
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1
Answer:
both will return at same time interval if the medium is vacuum
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0
Answer:
They will reach the ground at the same time because the force of gravity which is acting upon them is equal.
The time taken to reach the ground depends on acceleration due to gravity.
According to Newton's Law of Gravitation
F = Gmm₁ / r²
where m = mass of the body , m₁ = mass of earth, r = distance of object from centre of earth
According to Newton's Second Law of Motion,
a = F / m
Substitue F = Gmm₁ / r²
a = Gmm₁ / r²m
m i.e the m mass of the body is cancelled
∴ the equation becomes
a = Gm₁ / r₂
where a is the acceleration due to gravity which is independent of the mass of the body.
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