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How do I set up this h=-16t^3+28t problem (see details)?
The height of an object tossed upward with an initial velocity of 12ft. per second is given by the formula: h=-16t^3+28t.
h is the height in ft.; t is the time in seconds
Find the time required for the object to return to its point of departure.
DO NOT give me the answer. Please explain how to set it up. It is an algebra course, not a physics course.
2 Answers
- Old TeacherLv 79 years agoFavorite Answer
The height at t= 0 is h(0)=0
To find the time to return to this height is to set h= 0 and solve for t:
-16t^3+28t=0
You will get three answers for t: one is negative (discard), one is zero, which you already knew.
The third answer is the one you were looking for.
Hoping this helps!
