A stream of glass beads, each with a mass of $15\ gram$, comes out of a horizontal tube at a rate of $100\ per second$. The beads fall a distance of $5\ m$ to a balance pan and bounce back to their original height. How much mass(in $kg$) must be placed in the other pan of the balance to keep the pointer at zero?
A stream of glass beads, each with a mass of $15\ gram$, comes out of a horizontal tube at a rate of $100\ per second$. The beads fall a distance of $5\ m$ to a balance pan and bounce back to their original height. How much mass(in $kg$) must be placed in the other pan of the balance to keep the pointer at zero?
- A
$3$
- B
$6$
- C
$9$
- D
$12$
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