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Answer:
Time at which the hammer reaches the ground is 2.3 seconds.
Step-by-step explanation:
We are given the formula as, .
It is known that, when height i.e. meter, then velocity
m/sec.
So, we get the formula as, .
Now, when the hammer hits the ground, the height meter.
Thus, we have,
⇒
⇒
⇒
i.e. t= ±2.3 sec
Since, time cannot be negative.
So, t= 2.3 sec
Hence, the time at which the hammer reaches the ground is 2.3 seconds.