Two cannonballs are dropped from a second floor physics lab at height h above the ground. Ball B has four times the mass of ball A. When the balls pass the bottom of a first floor window at height $\frac{h}{4}$ above the ground, the relation between their kinetic energies, KA and KB, is:
A)KA = 4KB.
B)KA = 2KB.
C)KA = KB.
D)KB = 2KA.
E)KB = 4KA.

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The Answer of Two cannonballs are dropped from a second floor physics lab at height h above the ground. Ball B has four times the mass of ball A. When the balls pass the bottom of a first floor window at height $\frac{h}{4}$ above the ground, the relation between their kinetic energies, KA and KB, is:
A)KA = 4KB.
B)KA = 2KB.
C)KA = KB.
D)KB = 2KA.
E)KB = 4KA.

Two Cannonballs Are Dropped from a Second Floor Physics Lab h4\frac{h}{4}4h​

Two Cannonballs Are Dropped from a Second Floor Physics Lab $\frac{h}{4}$