Question

A rock is tossed straight up with a speed of 26 m/s . When it returns, it falls into a hole 12 mdeep. How long is the rock in the air, from the instant it is released until it hits the bottom of the hole?

Step 1

Write the kinematic relation between initial and final velocity

Step 2

Substituting the values

Step 3

Since the rock is travelling downwards, the final velocity is negativ...

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