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Patil Devendra
Nov 19, 2020, 11:22:30 AM11/19/20
to Discussion forum for Mathematics for Data Science I
1 point
A stone is thrown with an initial speed u (m/s) as shown in figure 3. The height of the stone’s trajectory above the ground is, H(t)=−5t2+12ut (here t is the time of flight). If the highest point in air that the stone can reach is 5m above the ground, then calculate the initial speed u.
20 m/s
10 m/s
12 m/s
2 m/s
No, the answer is incorrect.
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Score: 0Accepted Answers:
20 m/s
nikhil kambli
Nov 19, 2020, 9:29:30 PM11/19/20
to Discussion forum for Mathematics for Data Science I, Patil Devendra
solve the equation for maximum height
get it in the form of ax2+ bx + c
get value of a
then solve for the value t max using -b/2a
substitute in the a in the ax2 +bx +c
it is lengthy but this is what my non math brains could thnk off there might be an easier way also
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