I have no idea what does this have to do with physics but hope you can explain...
A passenger on a bus moving east sees a man standing on a curb. From the passenger's perspective, the man appears to be...
a)stand still.
b) move west at a speed that is less than the bus's speed.
c) move west at a speed that is equal to the bus's speed.
d)move east at a speed that is equal to the bus's speed.
And how can you tell???
This is related to physics since it is talking about relativity.
The answer is c. Imagine looking out your car window at a bus stop. If you are moving right, the bus stop seems to be moving towards your left.
It moves to the left at the same speed as you move to the right.
Everything in physics is about relativity. Physics on earth is relative to the earth, whereas astronomy is based on different points in the galaxy
Think of driving in a car in the passenger's seat. You see a stop sign coming up. Pretending you're not moving at all, that stop sign is moving at you at the same speed you are actually moving towards it and in the opposite direction. Your answer is c.
To determine how the man appears to be moving from the passenger's perspective, we need to consider the relative motion between the passenger and the man.
Since the passenger is on a bus moving east, the frame of reference is the moving bus. This means that the passenger's perception of motion will be based on their own motion relative to the surroundings.
Now, let's analyze the options:
a) If the man appears to be standing still, it means that his motion relative to the bus is also stationary. This would be possible if the man is moving at the same speed in the same direction as the bus.
b) If the man appears to be moving west at a speed less than the bus's speed, it suggests that his motion is opposite to that of the bus but at a slower rate.
c) If the man appears to be moving west at a speed equal to the bus's speed, it indicates that his motion is opposite to that of the bus, matching the bus's speed exactly.
d) If the man appears to be moving east at a speed equal to the bus's speed, it implies that the man is moving in the same direction as the bus but at the same rate.
Now, to determine the correct answer, we need to consider the relative motion between the man and the bus. Since the question states that the man is standing on a curb, which is not moving, it means that the man is stationary relative to the ground.
Considering this, the correct answer is (b) move west at a speed that is less than the bus's speed. This is because, from the moving bus, the stationary man would appear to be moving in the opposite direction but at a slower speed than the bus.