You have landed on an unknown planet, Newtonia, and want to know what objects will weigh there. You find that when a certain tool is pushed on a frictionless horizontal surface by a 12.8 N force, it moves 17.0 m in the first 2.10 s, starting from rest. You next observe that if you release this tool from rest at 10.0 m above the ground, it takes 2.88 s to reach the ground. What does the tool weigh on Newtonia (in N)?What would it weigh on Earth (in N)?

Explanation:

The given data is as follows.

    = 0,     = 0,       = 0

    = 17.0 m,       = 2.10 sec

As the force P is constant and the mass "m" of the tool is constant then it means that the acceleration "a" will also be constant.

Now,

                 =

               17.0 = 2.205a

               a =

Also, we know that

                       F =

                   m =

So,              m =

                       = 1.66 kg

Since, the tool is subject to its weight W and is in free fall. Hence,

     10.0 m =        

           g = 2.411

Hence, weight of tool in Newtonia is as follows.

                   W = mg

                       =

                       = 4.00 N

Hence, weight of the tool on Newtonia is 4.00 N.

And, weight of the tool on the Earth is as follows.

                  W =

                      = 23.62 N

Hence, weight of the tool on Earth is 23.62 N.

gravity

explanation:

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.