Question

Solve the following word problems.

A bird sitting 16 feet above the ground in an apple tree dislodges an apple. After how many seconds does the apple land on the ground? (Assume no branches interfere with its fall.)

I'm a bit stumped by this question because the book doesn't give the weight of the apple, or even really the height from which it fell. (The bird who dislodged it was 16 feet above the ground, but I can't be sure the apple was.) This was in the unit about polynomials and factoring, so I assume it has to be solved in that way. Anyway, if you know how to solve this one, please do and show your work. Thank you!

Answer 1

If a partical falls from up doesn't matter it's weight.  

Because we know the formula

Here we see that s=displace ment (here is 16 feet)

u=initial velocity (here is 0)

g=accelaration due to gravity (in fps system it's 32f/sec²)

In this equation doesn't require mass.

So ,

16 = (1/2)×32×t²

^Or, t²=1

or, t=+1 (-1 not taken as time can not negative)

=> Required time is 1 sec.