A 0.030 kg bullet traveling at 220 m/s in the +x direction hits a motionless 1.4 kg block and bounces off it, retracing its original path with a velocity of 170 m/s in the –x direction. What is the final speed of the block? Assume the block rests on a perfectly frictionless surface.
A. 1.1 m/s.
B. 3.6 m/s.
C. 4.7 m/s.
D. 8.4 m/s.
Answer:D
A 0.030 kg bullet traveling at 220 m/s in the +x direction hits a motionless 1.4 kg block and bounces off it, retracing its original path with a velocity of 170 m/s in the –x direction. What is the final speed of the block? Assume the block rests on a perfectly frictionless surface.
A. 1.1 m/s. B. 3.6 m/s. C. 4.7 m/s. D. 8.4 m/s.