You are a police officer who arrives at a scene of an accident. The only evidence that you have is the skid mark left on the road. Fortunately no one gets hurt. The driver indicates that he was not speeding. How could you be sure that he was speeding or not. Explain how you would
calculate and analyze his speed. You can use the formula : W = change in kinetic energy (energy- work theorem).

50 inches should be the resultant vector

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.

im sorry i dont know

that would be because of both gravity and friction. so     c