Question

KE of body is increased by 300%. Find change in momentum.
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Answer 1

Answer:

300

Explanation:

because ke is directly proportional to momentum

Answer 2

Answer:

100%

Explanation:

KE = P^2/2m ; P : momentum ; m : mass

now.....

100 × (KE2 - KE1) / KE1 = 300

[(P2)^2/2m - (P1)^2/2m ] / (P1)^2/2m = 3

[(P2)^ - (P1)^2] /(P1)^2 = 3

(P2/P1)^2 - 1 = 3

(P2/P1)^2 = 4

(P2/P1) = 2

(P2/P1) - 1 = 2 - 1

(P2 - P1)/P1 = 1

100 × (P2 - P1)/P1 = 100

hence....P% = 100