The potential energy of the lemming is 1.53 J
Explanation:
The potential energy (PE) of an object is the energy possessed by the object due to its position in the Earth's gravitational field, and it is given by:
where:
m is the mass of the object
is the acceleration of gravity
h is the height of the object relative to the ground
In this problem:
m = 0.0780 kg is the mass of the lemming
We want to find the potential energy when the height is
h = 2.00 m
Therefore, we find:
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Answer:
Total Work=2275000 ft-lb
Explanation:
According to Riemann sum approximate for work needed to lift the cable:
Sine we have to add 650 terms because distance 650 ft, we will us the integration.
Work done on lifting:
Total Work=
Total Work=1690000+585000
Total Work=2275000 ft-lb