Question

A boy on a trolley is sliding down on a smooth incline having inclination angle 37°. He throws a ball such that he catches it back after time 5 sec With what velocity was
the ball thrown by the boy relative to himself?​

Answer 1

I KNOW HTE ÅÑSWÈR BUT I DON'T KNOW HOW TO EXPLAIN.

Explanation:

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Answer 2

Answer:

$2 | |?| | \times \frac{?}{?}$