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Klio2033 [76]
3 years ago
9

A rock weighing 98 newtons is pushed off the edge of a bridge 50 meters above the ground. What was the potential energy of the r

ock before it began to fall?
Physics
2 answers:
barxatty [35]3 years ago
5 0

<u>Answer:</u> The potential energy of the rock before it began to fall is 4900 J

<u>Explanation:</u>

Force is defined as the mass multiplied by the acceleration of the object.

F=mg

where,

F = force exerted on the object

m = mass of the object

g = acceleration due to gravity

Potential energy is defined as the energy possessed due to the height of the object.

Mathematically,

E_p=mgh

Or,

E_p=F\times h

where,

E_p = potential energy of the rock = ?

F = force applied on the rock = 98 N

h = height of the bridge from where the rock is thrown = 50 m

Putting values in above equation, we get:

E_p=98N\times 50m\\\\E_p=4900J

Hence, the potential energy of the rock before it began to fall is 4900 J

lidiya [134]3 years ago
4 0
Ep = 4900 because Ep = wh
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