A pencil on a car

publish date2022/08/06 08:32:7.766746 GMT+1

Suppose you are a passenger in a car moving at 55 miles per hour.  You lift a pencil to the ceiling of the car and drop it.  Just before it hits the seat, how fast is it traveling forward? miles/hour.  Is the downward speed of the pencil increase or decrease?

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Correct Answer

(1) 55
(2) increase


Its forward speed is still 55 miles/hour; Its downward speed is increasing at the acceleration of gravity.


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