He or she would enjoying doing a job as a caretaker
Gravity - is the universal force that is effective over the longest distance.
Answer:
10 Joule
Explanation:
The solution and answer are well written in the Pic above.
A reactant since it is on the left of the arrow
Answer:F=648 N
Explanation:
Given
mass of man 
mass of Platform 
acceleration of system 
Let F be the force with which man pulls the rope which will also create a tension of F in rope
From Diagram





