Asked by Jamika
                A acorn falls from a tree and hits the ground with a speed of 10 m/s:
- From what height did the acorn fall?
- How long was the acorn in the air?
            
        - From what height did the acorn fall?
- How long was the acorn in the air?
Answers
                    Answered by
            MathMate
            
    If the acorn fell from rest,
equate energies
mgh=(1/2)mv²
h=v²/2g
=100/(2*9.8)
=5.1 m
Time
=v/g
=10/9.8
=1.02 s
    
equate energies
mgh=(1/2)mv²
h=v²/2g
=100/(2*9.8)
=5.1 m
Time
=v/g
=10/9.8
=1.02 s
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