Answer:
0.05 kg*m/s downward
Step-by-step explanation:
The momentum of an object is equal to its mass multiplied by its velocity. In this case, the mass of the apple is 0.50 kg and its velocity is 0.10 m/s, so the momentum of the apple is:
0.50 kg * 0.10 m/s = 0.05 kg*m/s
Therefore, the correct answer is D: 0.05 kg*m/s downward.