Q. 84.0( 2 Votes )

# An object of mass 1 kg has a potential energy of 1 joule relative to the ground when it is at a height of :

A. 0.102 m

B. 1 m

C. 9.8 m

D. 32 m

Answer :

Given,

Mass m= 1 kg

Potential energy = 1 J

Height h=?

Let g = 9.8 ms^{-2}

We know

Potential energy = m × g × h

Substituting the values in this formula

1 J = 1 kg× 9.8 ms^{-2} × h

h =

h = 0.102 m

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