Acceleration WS 6: Free Fall For each problem, list your known values, unknown variables, and what tools you can use to solve the problem.
1. A tennis ball is dropped from the sky, taking 5.0 s to reach the Earth. Draw a diagram of the scenario, labeling known values.
2. How high was it dropped from?
Knowns
Unknown(s)
Tools)
Solution
3. How fast was it going just before it hit the ground?
Knowns
Unknown(s)
Tools)
Solution

3.2x10^7

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

god i hope this !