EM-2795

Rate and average speed

E Math · Secondary 4 · Medium · Rate and average speed

A car travels at a constant speed and covers 180 m in 12 s. Find its acceleration if it increases its speed uniformly to 25 m/s in the next 8 s. Assume the speed at the end of the first 12 s is the initial speed for the acceleration phase.

$1.25\text{ m/s}^2$
$0.75\text{ m/s}^2$
$2.08\text{ m/s}^2$
$3.13\text{ m/s}^2$

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