What is the work done to lift a body of mass 5 kg to a height of 50 m from the ground (in J)? (g=10 )
The explanation for the correct answer
Step 1: Given Data
The mass of the body is.
Initially, the body was on the ground.
The body is lifted to a height of.
Step 2: Calculation of work done
The value of work done will be equal to the change in potential energy of the body when the body is lifted from the ground to the height().
Mathematically. Here.
Potential energy = ()
initial potential energy (when the body is on the ground) will be
Here, so
Similarly, final potential energy ( when the body is at height) will be
Now the work done will be
=
Hence, the correct answer is (C).