Gujarati
2.Motion in Straight Line
easy

An iron ball and a wooden ball of the same radius are released from the same height in vacuum. They take the same time to reach the ground. The reason for this is

A

Acceleration due to gravity in vacuum is same irrespective of the size and mass of the body

B

Acceleration due to gravity in vacuum depends upon the mass of the body

C

There is no acceleration due to gravity in vacuum

D

In vacuum there is a resistance offered to the motion of the body and this resistance depends upon the mass of the body

Solution

The iron ball and wooden ball when released from the same height in vacuum will reach the ground exactly, under the action of gravity, at the same time due to the lack of air resistance.

Galileo statement:In the absence of air resistance, all bodies fall at the same acceleration, approx equal to $9.8\,ms ^{-2}$.

Standard 11
Physics

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