Question

two particles of masses 1g and 4g are moving with equal linear momentum.what is the ratio of kinetic energy?

Answer 1

m1=1

m2=4

m1v1=m2v2

1*v1=4*v2

v1/v2=4/1

squaring both sides

(v1/v2)^2=16/1

KE1/KE2=m1v1^2/m2v2^2

=1/4*16/1

=4/1

=4:1