Question

A 4kg eagle picks up a 75g snake and raises it 2.5 m from the ground to a branch. What is the work done by the eagle on the snake? (Assume g = 10 m/s^2)

(a) 100 J

(b) 1.875 J

(c) 118.75 J

(d) 10 J

I had been asked this question in final exam.

My enquiry is from Gravitational Potential Energy topic in portion Gravitation of Physics – Class 11

Answer 1

The correct option is (b) 1.875 J

The explanation is: The work done by the eagle on the snake depends only on the mass of the snake.

Hence, the work done on the snake = (0.075 x 10 x 2.5) J

 = 1.875 J.