Question

An object takes 5 s to reach the grond
from a height of 5 m on a planet.
What is the value of g on the planet?
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Answer 1

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Answer 2

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⍟AnSwer:

• The value g on the planet is 0.4m/s².

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⍟How To Solve?

In this question we will use kinematics equations.

• The kinematic formulas are a set of formulas that relate the five kinematic variable.

Since we have the height and time we will use the following kinematics equation.

➔ S = ut + 1/2gt²

Here,

• S = height
• u = initial velocity
• t = time in sec
• g = gravitational acceleration

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⍟SoluTion:

In this case the initial velocity is 0.

So,

Now using the above kinematic eqn let us solve the problem.

➠S = ut + 1/2gt²

➠5 = 0 × 5 + 1/2 × g × 5²

➠5 = 12.5g

➠g = 5/12.5

➠g = 0.4 m/s²

Therefore, value of g on the planet is 0.4m/s²

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