Question

a stone is thrown vertically upward with an initial velocity of 40m/s^2. Taking g=10m/s^2 find maximum height reached by the stone​

Answer 1

Answer:

Topperlearning

 

CBSE Class 9 - Ask The Expert

 

Answered

u = 40 m/s  

As the stone is thrown upward the acceleration due to gravity is to be taken negative.

g = - 10 m/s2  

v2 - u2 = 2as

For free fall we can write this equation as,

v2 - u2 =2gh

As the stone reaches the maximum height its final velocity v =0

Thus,

0 - (40)2 = 2× (-10) × h  

- 1600 = -20 × h  

h = 80 m  

So, the maximum height to which the stone can reach is 80 m.

 

The total distance covered by the stone = 80 + 80 = 160 m  

And as th stone comes back to its initial position the displacement of the stone = 0