A moving sidewalk has a velocity of 1.7 m/s north. If a man walks south on the sidewalk at a speed of 1.1 m/s, how long does it take him to travel 15 m north in relation to a stationary observer?

explanation:

newton's third law, for every action there is an equal and opposite reaction.

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.