Questions
The K.E. of a body decreases by 19%. What is the percentage decrease in momentum ?
a
20%
b
15%
c
10%
d
5%
detailed solution
Correct option is C
Let v and y be the initial and final velocities of the body. Then12mv'212mv2=81100 ∴ v'v=910 or mV'mV=90100=90% So, the decrease in momentum is 10%.Talk to our academic expert!
Similar Questions
A light body A and a heavy body B have equal linear momentum. Then the KE of the body A is
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