Question

calculate the instantaneous speed of an apple that falls freely from a rest position and accelerates at 10m/s^2 for 1.5 seconds

Answer 1

Answer on Question #62505 - Physics - Atomic and Nuclear Physics

Question:

Calculate the instantaneous speed of an apple that falls freely from a rest position and accelerates at $10\mathrm{m/s}^2$ for 1.5 seconds.

Solution:

Let $v_0$ — initial speed of an apple,

$a$ — its acceleration,

$t$ — time,

$v_t$ — instantaneous speed at moment $t$.

We can write that $v_t = v_0 + a \cdot t$.

Because an apple falls from a rest position $v_0 = 0 \, \text{m/s}$, and then $v_t = 0 + 10 \cdot 1.5 = 15 \, \text{m/s}$

Answer:

$15 \, \text{m/s}$

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