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A ball of mass 8 kg is dropped from a height of 20 m. What is the velocity with which it strikes the ground?
  • a)
    16 m/s
  • b)
    12.5 m/s
  • c)
    24 m/s
  • d)
    20 m/s
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A ball of mass 8 kg is dropped from a height of 20 m. What is the vel...
PE lost = KE gained
KE gained = mgh
KE gained = 8*10*20
KE gained = 1600 J
KE = (1/2)mv2
1600 = (1/2)*8*v2
Solve for v
V = Square root of 400
V = 20 m/s2
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A ball of mass 8 kg is dropped from a height of 20 m. What is the velocity with which it strikes the ground?a)16 m/sb)12.5 m/sc)24 m/sd)20 m/sCorrect answer is option 'D'. Can you explain this answer?
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