Physics
jiahui
2021-04-02 10:21:42
A bus slows down uniformly from 75.0 km/h ( 21 m/s) to 0 km/h in 21 s. How far does it travel before stopping
ANSWERS
Anadio910
2021-04-02 15:18:47

In this question two important things are already given . Let us first note them down first. Speed of the bus = 75.0 km/hr or 21/s Time before it finally stops = 21second. It is better to calculate in miles per second as the time given is in second. This will make the problem easier. We already know that Distance traveled = Speed * time                              = 21 * 21 meters                              = 441 meters So the bus will stop after traveling a distance of 441 meters. This distance can be converted to kilometer as well very easily now. 1000 meter = 1 km 441 meters = 441/1000 km                    = 0.441 km So the bus will stop after 441 meters or 0.441 kilometers.

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