Question

When do we use this equation??
$2 \: a \: s \: = {v}^{2} - {u}^{2}$
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Answer 1

Answer:

The equations of motion with constant acceleration: v = u + at v2 = u2 + 2as s = ut + 1 2 at2 where u = initial speed, v = final speed, a = acceleration, t = time, s = distance travelled.

Answer 2

Answer:

Another equation of motion states 2as = v² - u².

As before, v = final speed, u = initial speed, a = acceleration, s = distance travelled.

Suppose a stone is dropped from a cliff which is 100m high.

Because the stone is simply dropped, rather than thrown, its initial speed is zero, and so u = 0.

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Hope it helps you!!

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