A block of wood of 1.20 kg is initially at rest. A bullet of mass 0.030 kg traveling at 180 m/s in the +x direction strikes the block and becomes embedded in it. Consider the frictional force between the block and the ground to be negligible. What is conserved for this collision?
A. Momentum only.
B. Kinetic energy only.
C. Both momentum and kinetic energy.
D. (Neither momentum nor kinetic energy are conserved for this collision.)
Answer:A
A block of wood of 1.20 kg is initially at rest. A bullet of mass 0.030 kg traveling at 180 m/s in the +x direction strikes the block and becomes embedded in it. Consider the frictional force between the block and the ground to be negligible. What is conserved for this collision?
A. Momentum only. B. Kinetic energy only. C. Both momentum and kinetic energy. D. (Neither momentum nor kinetic energy are conserved for this collision.)