Question #208608

A truck’s speed increases uniformly from 15 km/h to 60 km/h in 20 s. Determine (a) the average speed, (b) the acceleration, and (c) the distance travelled, all in units of meters and seconds.


1
Expert's answer
2021-06-21T11:39:11-0400

(a) The average speed:


v=v1+v22=10.4 m/s.v=\frac{v_1+v_2}{2}=10.4\text{ m/s}.

(b) The acceleration:


a=v2v1t=0.625 m/s2.a=\frac{v_2-v_1}{t}=0.625\text{ m/s}^2.

(c) The distance is


d=v22v122a=208 m.d=\frac{v_2^2-v_1^2}{2a}=208\text{ m}.


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Comments

Aduna Marvin
23.06.23, 19:32

Great job

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