Question

a shool bus slows to a stop with an acceleration of -2.0m/s2. show that it takes 5.0s for the bus to slow from 10.0m/s2 to a stop

Answer 1

\[a=\frac{ -2 m }{ \sec ^{2} }:given\]
If you know calculus, you know that velocity is the integral of acceleration, plus some constant which represents the initial velocity;
\[v=v _{0}+at,\]
where a is the acceleration, v0 is the initial velocity, t is the time and v is velocity.

You can solve the latter equation for t before substituting the known values of v0, a and v.

Answer 2

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Answer 3

substituting these values into the that equation for t will give you the time required for the school bus to come to a stop under the circumstances described. Good luck!