A man throws a body of0.5kg with a velocity10m/s vertically on a planet andcatches it after8sec.find wt.ofbody

Question

Do this numerical on physics

Answer 1

wt.ofbody <--- what is this?

Answer 2

confusing question??

It seems the author of this question thought that on a particular planet, its acceleration due to gravity will make the body to move up and down in different timings. Yes it is true. But the question should be framed in a different way

This question can be solved this way

Let us consider total time taken is T, initial velocity ‘u’ and acceleration due to gravity is ‘g’

By definition T = 2u/g  or 8= (2*10/g) or g = 20/8 = 2.5 m/s^2

Therefore weight of the body = mass x acceleration due to gravity = 0.5 x 2.5 = 1.25 N

Answer 3

The value of 'g' here should not be taken conventionally as 9.8 or 10.Instead it should be calculated.

  

         Time of flight=2(initial velocity)/g

          

                 8=2(10)/g

        

           So  g=2.5

Now weight=(mass)g

                =(0.5)(2.5)

                =1.25N

Answer 4

The answer is 1.25 N.

The body reaches the max. height in 4s.Therefore acceleration due to gravity is 10/4 = 2.5m/s^2. Thus the weight of the body is 2.5 * 0.5 = 1.25N.

Answer 5

Is'nt wt of body remains the same as 0.5 kg?