A bullet is shot straight upwards with and initial speed of 640ft/s .the functions is h (t) =-16t +640t guves the height of yhe bullet time at time when does bulket hit the ground
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T= 0 seconds.
Step-by-step explanation:
Initial speed= 640ft/s.
Given the function h(t)= -16t+640t= 624t
we know that velocity=V=dh(t)/dt
so differentiating with respect to time ,we get V=624m/s.
equating this to zero we can get that value of time where time at which the bullet will hit the ground is 0 seconds.
The question would have a valid answer if h(t) would have been equal to -16t²+640t.
in that case the answer would have been 40 seconds.
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