anonymous
  • anonymous
A 4kg ball is dropped from a heught of 15 m from the floor, what is the kinetic energy when it strikes the floor? Use conservation of energy
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
What kind of energy do you think the ball has before it's dropped?
sohailiftikhar
  • sohailiftikhar
first find P.E throw mgh
arindameducationusc
  • arindameducationusc
mgh=P.E

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arindameducationusc
  • arindameducationusc
4*9.8*15
sohailiftikhar
  • sohailiftikhar
(4)(15)(10)=600 take g=10m/s^2
sohailiftikhar
  • sohailiftikhar
for accurate value g=9.8m/s^2 (4)(15)9.8=closer to 600m/s
sohailiftikhar
  • sohailiftikhar
as total energy remains conserved so at max height all energy equal to P.E and K.E=0 and at closer to ground all energy is K.E and P.E=0 but total energy remain same so your .K.E will also be (4)15)(9.8)=?
anonymous
  • anonymous
588 J ?
sohailiftikhar
  • sohailiftikhar
yes
anonymous
  • anonymous
thank you :)

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