Question

if Momentum decreased by 19% calculate percentage decrease in kinetic energy

Answer 1

K= p /2m
p= square root.2mK
Decrease in Kinetic energy= 19% of K
i.e 19/100 * K = 0.19 K
Final K.E , K'= 0.81
Final momentum, p' = square rt. 2mK' = sqr. rt. 2m x 0.81K
= 0.9 square root 2mK = 0.9p
increase in p
p-p'/p x 100 = p-0.9p/p x 100 = 10%

Answer 2

Answer:

Explanation:hey here is your answer...........

when a body covers equal distances in equal interval of time then it is said uniform motion

when a body cover unequal distances in equal interval of time then it is said to be non uniform motion.

hope it is helpful