When the mass of a moving object is doubled with no change in speed, by what factor is its momentum changed? By what factor is its kinetic energy changed?
2006-11-12 02:18:12 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
First write the formula for Momentum:
Momentum=m*v
Now double m:
Momentum=2mv
Therefore, when you double m, momentum is likewise doubled.
Write down the formula for kinetic energy:
KE=1/2mv^2
Now double m:
KE=1/2(2m)v^2
KE=mv^2
Therefore, when you double m, KE is likewise doubled.
That's the way to analyze these problems. Start with the formula and substitute the given value to find the effect on the original formula.
2006-11-12 02:34:44 · answer #1 · answered by tul b 3 · 0⤊ 1⤋
momentum = mv, so momentum doubles
KE= 1/2 mv^2, so KE also doubles
2006-11-12 02:32:54 · answer #2 · answered by WildOtter 5 · 1⤊ 0⤋