ICSE Class 8 Answered
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 | 21 Sep, 2019, 19:17: 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 | 22 Sep, 2019, 13:40: PM
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