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NemiM [27]
2 years ago
14

A rock of mass 200kg is dropped from a height of 200m. What is the Kinetic energy at:

Physics
2 answers:
const2013 [10]2 years ago
5 0
Da ansa is d ) jus befoo it hits da ground
Oksana_A [137]2 years ago
5 0

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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