Question

An object takes 5s to reach the ground from a height of 5 m on a planet.what is the value of g on the planet?

Answer 1

S=ut+0.5at^2. 5=0+a×25. a=5÷25=0.2Ans

Answer 2

Since we know that,
h=ut+gt2/2h=ut+gt2/2
As the primary velocity u=0u=0
g=2h/t2g=2h/t2
Now the value for h is 5 m and for time t is 5 s
So, g=2∗5/52g=2∗5/52
That means g=0.4ms−2g=0.4ms−2