Arun swims in a 135 m long pool. He covers 270 m in 1.5 minutes from one end to the other and back along the same straight path. What is the average velocity of Arun?
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Force= 45 N
Height = 4m
\boxed{\rm{\red{Find \longrightarrow }}}
Find⟶
gravitational potential energy of this object?
\boxed{\rm{\pink{Formula \ used \longrightarrow }}}
Formula used⟶
\sf{\red{ PE_G= mg \Delta h}}PE
G
=mgΔh
where,
\sf{PE_G}PE
G
=potential energy due to gravity
g=acceleration due to gravity
m=mass
\sf{\Delta h}Δh = distance above a surface
\boxed{\rm{\purple{SoLution \longrightarrow }}}
SoLution⟶
we know
F= m a here, {a= g}
so the value of mg= F
by Putting value in the formula we get,
\sf{PE_G= 45 \times 4}PE
G
=45×4
\sf{ PE_G= 180}PE
G
=180
\underline{\bf{\therefore Gravitational \ Potential \ energy \ = 180 kg m^2 /s^2}}
∴Gravitational Potential energy =180kgm
2
/s
2
__________________________
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