Question 1163770
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<pre>

In Physics, there are simple formulas to solve such problems


(a)  t = {{{V[0]/g}}}, where t is the time under the question,  {{{V[0]}}}  is the initial speed (vertically),

         g is gravity acceleration.


     So,   t = {{{42/9.81}}} = 4.28 seconds.




(b)  {{{h[max]}}} = {{{V[0]^2/g}}} = {{{42^2/9.81}}} = 179.8 m.     <U>ANSWER</U>
</pre>

Solved.


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Do you have an appropriate textbook in Physics ?


Which one, exactly ?