Answer to Question #113 in Mechanics | Relativity for Lisa

Question

Two bodies of equal volume — made of steel and lead - move with identical velocities. Compare the impulses of these bodies.

Answer 1

With equal speed, the momentum depends only on the masses. Under equal volumes, the density of lead is 11,35 g/cm3, the density of steel is 7,85 gr/cm3. The density of lead is higher, this means that body weight of the lead body is bigger, thus the impulse is also bigger.