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Question

# A hollow iron ball and a solid iron ball are dropped from the same height. Neglecting air resistance, which ball reaches the ground first?

A
Solid iron ball
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B
Hollow iron ball
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C
Both will reach at the same time
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D
They wont reach the ground
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Solution

## The correct option is D Both will reach at the same timeConsidering the air resistance as nil, the weight in both the cases will be mg. So, the acceleration would be g by newton's second law of motion. Now , s=ut+12gt2 s: displacement is same for both the ballsu=0 for both and g=9.8m/s2 So both of them will take the same time to reach the ground .

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