Question

Please explain

Incorrect. Before working this problem, review Conceptual Example 14. A pellet gun is fired straight downward from the edge of a cliff that is 14.0 m above the ground. The pellet strikes the ground with a speed of 28.5 m/s. How far above the cliff edge would the pellet have gone had the gun been fired straight upward? Number [22.19 Units

Answer 1

Given is:-

Height of the cliff  

Speed of pellet when it reaches the ground  

Now,

Using third equation of motion

by plugging all the vales we get

which gives us the initial speed of the pellet, which is

Now again using the third equation of motion but this time in upward direction, hence g=-9.8 m/s²

thus

(Because at maximum height the upward velocity will be zero)

which gives us

This is the height the pellet gone above the cliff