Question

a body is dropped from a height of 20 m above the ground if gravity disappears 1 second after it starts falling the total time it takes to hit the ground

Answer 1

Answer:

Answer is 2.5

Explanation:

For the first second we have to calculate the s using second equation

that is s=ut+1/2at^2

u=0 t is 1

we will get s=5

if the first second distance is 5 then rest it is 15 after that calculate v of the first second we know that v of that is u of the second journey use 1st equation

then we will get v=10

after that, we cant apply the equations of motion so we have to use

normal formula that is s=d/t after that

we will get 1.5 and after that we have to add 1+1.5

1 is the value of the first second add them we will get 2.5

which is the answer

hope this helps u mate

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