Question

An eagle that has a mass of 4.5 kg is spotted 5 m above a lake. It flies up to its nest in a tree at a height of 25 m. How much gravitational potential energy did the eagle gain?

Answer 1

Answer: 882 J

Explanation:

Correct on E2020

Answer 2

Answer:

900 J

Explanation:

Given, mass of eagle, m=4.5 kg

Initial height , $h_1=5\ m.$

Final height , $h_2=25\ m.$

Gain in height=$h_2-h_1=25-5\ m=20\ m.$

We know Gravitational potential energy of an object is given as $Mgh .$

Here , g is acceleration due to gravity=9.8 $m/s^2.$

          M is mass of object.

           h is height of object.

Now, gain in potential energy = $m\times g\times h=4.5 \times 20 \times 10 \ J=900 \ J.$

Therefore , this is the required solution.