Physicshard · Past Paper
Two bodies of masses m and 4m are moving with equal linear momentum. The ratio of their kinetic energies is:
A1:2
B1:4
C4:1
D1:1
✓ Correct Answer: C — 4:1
KE = p^2 / 2m. If p is constant, KE is inversely proportional to m. KE1 / KE2 = m2 / m1 = 4m / m = 4:1.
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