The equation of the fall from rest under the influence of only gravity is

`x = g*t^2/2` , where *x *is the height of the
fall, *a* is the acceleration due to gravity,
and *t *is the time during which the fall took
place.

For the object on the surface of the Earth, acceleration due to gravity is g = 9.8 m/s^2 and the time `t_E` of the fall from rest is 3.4 s.

For the object on planet X, the acceleration due to gravity is g/5. Then, the time `t_x` of the fall from rest from the same height can be determined from

`g (3.4)^2/2 = 1/2*g/5*t_x^2`

From here,

`t_x = sqrt(5)*3.4 s=7.6 s` .

It would take `sqrt(5)`

times longer for the object to fall on the planet where the gravity is five times weaker.

**On planet X, it would take the object 7.6 seconds to fall the same
distance.**

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**Further Reading**