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eichlingkera3
10.12.2019 •
Physics
Acar slows down at -5.00 m/s² until it comes to a stop after travelling 15.0 m. what was the initial speed of the car?
(unit = m/s)
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Ответ:
According to kinematics this situation is described as a uniformly accelerated rectilinear motion. This means the acceleration while the car is in motion is constant.
Now, among the equations related to this type of motion we have the following that relates the velocity with the acceleration and the distance traveled:
Where:
Now, let's substitute the known values in equation (1) and find
:
Multiplying by -1 on both sides of the equation:
Finally:
Ответ: