When a vertically falling firecracker bursts, the vector sum of momentum fragments
A. in the horizontal direction cancels to zero.
B. in the vertical direction equals the momentum of the firecracker before bursting.
C. both of these
D. neither of these
Answer:C
When a vertically falling firecracker bursts, the vector sum of momentum fragments
A. in the horizontal direction cancels to zero. B. in the vertical direction equals the momentum of the firecracker before bursting. C. both of these D. neither of these