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Q.

In vacuum all freely falling bodies

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a

have the same speed

b

have the same velocity

c

have the same force

d

have the same acceleration

answer is D.

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Detailed Solution

In a vacuum, all free-falling objects have the same acceleration.
This is not the case when an object passes through the earth's atmosphere. This is because the buoyant force acts on a lighter object and reduces its acceleration.
In a vacuum, all falling objects have the same acceleration.
The constant acceleration is due to the earth's gravity and is called gravitational acceleration given by:

g = G \frac{M}{R^{2}}

Where,

G =

gravity Constant

= 6.67 \times 10^{- 11} {Nm}^{2} {kg}^{- 2}

M =

Earth’s mass

R =

radius of the earth
From the above, we can see that all variables in the equation are constant.

g

is, therefore, constant, independent of other factors.

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