Need help- AS physics questions. Watch

senrab15
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Hi, I’m trying to complete some questions in preparation for my Physics mock.

“A bus is moving along a busy road at constant speed. A child throws its dummy out of one of the bus windows. A pedestrian on the pavement sees the dummy. Ignoring air resistance:

Describe the horizontal motion of the dummy observed by the pedestrian Describe the horizontal motion of the dummy observed by the child

Now, consider that air resistance is acting.

Describe the horizontal motion of the dummy observed by the pedestrian Describe the horizontal motion of the dummy observed by the child”

Any help would be greatly appreciated!
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Arctic Kitten
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Ignoring air resistance:
For the child, there's no horizontal motion, the dummy just fall straight down. This is similar to when she drop her dummy inside the bus.
For the pedestrian, the horizontal motion of the dummy is similar to that of the bus (with the same constant speed)

With resistance:
The child will see the dummy going back, because there's a net force act on the dummy (for the bus, air resistance and driven force of motor balance).
The pedestrian will see the dummy travel at a speed lower than that of the train. The speed of dummy will decrease and finally it will stop because the only force acting on it is the air resistance (provided that the vertical height is big enough)

Probably too long but that's what I think.
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senrab15
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Thankyou!!!
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