Question

A box is put on a scale which is adjusted to.
read zero, when the box is empty. A stream of
pebbles is then poured into the box from a
height h above its bottom at a rate of n pebbles,
Each pebble has a mass m. If the pebbles collide
with the box such that they immediately come
to rest after collision, the scale reading at timet
after the pebbles begin to fill the box.is
​

Answer 1

Answer:

Explanation:2nd option

Answer 2

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