Question

an object take 5s to reach ground from height of 5m on a planet what's the value of g on that planet​

Answer 1

Answer:

It can be weight of a ball

Answer 2

Answer:

Acceleration due to gravity on the planet: g = 0.4 m/s²

Explanation:

Displacement of the object: s = 5 m

Time taken by object to rech ground: t = 5 s

It has not been specified in the question about initial velocity so I'm assuming that object is dropped from the height. Therefore,

Initial velocity: u = 0 m/s

By using kinematic equation, we get:

$\sf s = ut + \dfrac{1}{2} g {t}^{2} \\ \\ \sf 5 = 0 + \dfrac{1}{2} \times g \times {5}^{2} \\ \\ \sf 5 = \dfrac{25}{2} \times g \\ \\ \sf g = 5 \times \dfrac{2}{25} \\ \\ \sf g = \dfrac{2}{5} \\ \\ \sf g = 0.4 \: m {s}^{ - 2}$

Value of g on that planet = 0.4 m/s²