an object is shot straight upward from sea level with an initial velocity of 250 ft/sec.

a) assuming that gravity is the only force acting on the object, give an upper estimate for it's velocity after 5 seconds has elapsed. use g=32 ft/sec^2 for gravitational acceleration.

b) using delta t=1 sec, find a lower estimate for the height attained after 5 seconds ...?

Question

Physics

Joslyn Stark

22 July, 23:47

an object is shot straight upward from sea level with an initial velocity of 250 ft/sec.

a) assuming that gravity is the only force acting on the object, give an upper estimate for it's velocity after 5 seconds has elapsed. use g=32 ft/sec^2 for gravitational acceleration.

b) using delta t=1 sec, find a lower estimate for the height attained after 5 seconds ...?

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Answers (1)

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Isabell Rollins · Answer 1

There are exact formulas for what you have asked for.

a) V = V0 + g*t

So V = 400 + - 32 * 5 = 400 - 160 = 340 ft/sec

b) s = s0 + v0*t + (1/2) * g*t^2

s = 0 + 400*5 - 16*25 = 2000 - 400 = 1600 ft

You do not state in your problem how you are to estimate these.