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.

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

happy to

pls mark as brainliest

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.