A child lifts a book of mass 1kg from the table to a cupboard at a height 2m from the floor .find the potential energy with respect to floor

Asked by sarab.kaul | 21st Sep, 2019, 07:17: PM

Expert Answer:

By given information we know that height upto which the book is lifted is 2 m from grouund. 
We know, 
 
Gravitational potential energy = work done against gravity = mgh
Where,
m- mass of book
g - gravity
h - height
Thus,
P.E. = 1 × 9.8 × 2 =19.6 J 
 
Thus, potential energy of book at height of two metres w.r.t floor is 19.6 J

Answered by Shiwani Sawant | 22nd Sep, 2019, 01:40: PM