Question
a stone is dropped from a hieght h. it hits the ground with a certain momentum P. if the same stone is dropped from a height 100% more than the previous height, the momentum when it hits the ground will change by
ans-41%
Read 1 Solution.
USE CONSVTN OF ENERGY
KE = PE (KE= p2/2m)
[(p1)2/2m ] / p22/2m = mgh1/ mgh2
p1/p2 = √h1/h2
let h1= 100 ,h2=200=(2h1) and p1=1
p2 = √2 p1
p2 = 1.41 p1
change = p2 -p1 = 1.41- 1 = 0.41 for %age it will be 41%
SARIKA 11 year ago
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