Question

A body takes 5 second to travel 80 m in a certain planet .Calculate the acc due to gravity on that planet

Answer 1

QUESTION:-

A body takes 5 second to travel 80 m in a certain planet .Calculate the acc due to gravity on that planet

EXPLANATION:-

• H=80 m
• Time taken=80 m
• u=0 m/s

Using 2nd equation:-

H=ut+1/2gt²

Substitute values

80=g/2(5)²

80=25g/2

160=25 g

g=160/25

g=6.4 m/s²

So the acc. due to gravity is 6.4 m/s²

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Answer 2

Given

• Initial Velocity (u) = 0 m/s
• Time (t) = 5 sec
• Distance (s) = 80 m

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To Find

• Acceleration (a)

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Solution

We'll apply the 2nd Equation of Motion to find Acceleration.

2nd Equation of Motion → $\sf s = \dfrac{1}{2}at^{2}+ut$

Substitute the values and find the value of 'a'

⇒ $80 = \dfrac{1}{2}a(5)^{2} + 0(5)$

⇒ $80 = \dfrac{1}{2}a(25) + 0$

⇒ $80 = 12.5a$

⇒ $a = \dfrac{80}{12.5}$

⇒ $a = 6.4 \ m/s^{2}$

∴ The acceleration would be 6.4 m/s²

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