Question

if you apply 1joule of energy to lift a book of 0.5 kg how high it will rise

Answer 1

Work=mgh
1 joule=(0.5)(9.8)h
4.9h=1
h=1/4.9
h=0.20 m

Answer 2

Given:

Energy applied=1J

Mass of the book=0.5kg

To find:

The height to which the book will rise

Solution:

The height to which the book will rise is 0.20m.

We can find the height by following the given steps-

We know that the energy applied to an object is the product of the mass of the object, the height to which it is raised, and the gravitational acceleration.

So, the energy applied=Mass of object× height to which it is raised× gravitational acceleration

The energy applied, E= 1J

The mass of the object, m=0.5kg

The gravitational acceleration, g=9.8m/s²

Let the height to which the book will rise be h.

E=m×g×h

On putting the given values, we get

1=0.5×9.8×h

1=1/2×98/10×h

1=49/10×h

h=10×1/49

h=0.20m

Therefore, the height to which the book will rise is 0.20m.