If two balls of same masses are dropped on sand, the depths of penetration is same if 1- Heavier ball is dropped faster than lighter ball 2- Lighter ball is dropped faster than heavier ball 3- The product 'mv' is same for both bodies 4- None of the above
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Answer:
Answer is 3
because:
● in (1) if havier ball is drooped fast
it's penetration in the soil would be more.
● in (2) in this the opposite lighter
ball would penetrate more.
● in (3) if the product 'mv' is same for
both bodies then the speed and wheigt will balance each other then
the penetration would be same.
● If (3) is correct then this is wrong
so (4) is also wrong
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