A force of 1000N acts to stop a 1000kg car moving at 20m/s. How much time does it take the car to stop?

Explanation:

How much force does a 1000kg car need to accelerate at 3m s2 to the south?

Answer- the force needed to accelerate the 1000kg car by 3m/s2 is 3000N.

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.

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up