An object is dropped from a cliff falls with a constant acceleration of $10 m / s^{2}$ . Find its speed 2s after it was dropped.

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Solution

Step1: Given:
$I n i t i a l s p e e d (v) = 0 m / s A c c e l e r a t i o n (a) = 10 m / s^{2} T i m e (t) = 2 s$
Step 2:Formula used:
$v = u + a t [w h e r e, v i s i n i t i a l v e l o c i t y, u i s f i n a l v e l o c i t y, a i s a c c e l e r a t i o n a n d t i s t i m e]$
Step 3: Final solution:
$v = u + a t v = 0 + 10 \times 2 v = 20 m / s$
Thus the initial velocity of an object is $20 m / s$

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An object is dropped from a cliff falls with a constant acceleration of 10m/s2. Find its speed 2s after it was dropped.

Step1: Given: Initialspeedv=0m/sAccelerationa=10m/s2Timet=2sStep 2:Formula used: v=u+at[where,visinitialvelocity,uisfinalvelocity,aisaccelerationandtistime]Step 3: Final solution: v=u+atv=0+10×2v=20m/sThus the initial velocity of an object is 20m/s

An object is dropped from a cliff falls with a constant acceleration of $10 m / s^{2}$ . Find its speed 2s after it was dropped.