A rock of mass 200kg is dropped from a height of 200m. What is the Kinetic energy at:
2 answers:
Da ansa is d ) jus befoo it hits da ground
Explanation:
1.
M=200kg
H=200m
for 0 second
now
ke=1/2mv^2
=1/2 .200.200/0
=40000/2
=20000 kgm/ s
2.
for 2second
now
ke=1/2mv^2
=1/2.200.200/2
=40000/4
=10000 <u>kgm</u><u>/</u><u>s</u>
3.
for 4second
now
ke= 1/2mv^2
=1/2.200.200/4
=40000/8
=5000 kgm/s
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