Final answer:
If a coin is dropped in a bus that is not moving, it will fall straight down to your feet due to gravity. If the bus is moving at a constant velocity, the coin will still fall straight down to your feet because its vertical motion is unaffected by the motion of the bus.
Step-by-step explanation:
When a coin is held above your head and dropped while in a bus that is not moving, the coin will land at your feet due to gravity. However, if the bus is moving at a constant velocity, the coin will still land at your feet. This is because the coin is in motion along with the bus and experiences the same horizontal velocity. Therefore, its vertical motion is unaffected by the motion of the bus, allowing it to still fall straight down to your feet.