Question

A feather and a coin will have equal accelerations when falling in a vacuum because their...

A feather and a coin will have equal accelerations when falling in a vacuum because their velocities are the same.

(A) the only force acting on both is gravity, even though the value maybe different for each.

(B) the force of gravity does not act in a vacuum.

(C) the force of gravity is the same for each in a vacuum.

(D) none of the above

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Answer #1

ANSWER :

Whenever an object falls under a vacume condition the only force acting on it is gravitational force (in general air resistance also acts). So in this condition accelaration due to gravity "g" is same for any body irrespective of its mass i.e g=9.81 m/s2. As the force of gravity is the product of mass and accelaration due to gravity (F = M*g) varies in accordence with mass.

Hence the only force acting on both is gravity, even though the value maybe different for each.

Option - (A) is correct answer.

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