Question

The work done in lifting an apple one meter

near Earth’s surface is approximately
(1) 1 J (3) 100 J
(2) 0.01 J (4) 1000 J

Answer 1

If we take an apple of mass 0.1Kg, assuming that the gravitational acceleration is
`g=10m/s^2`, we get
`W=1*0.1*10=\boxed{1J}`

Answer 2

Answer: Option 1: 1 J

Step-by-step explanation:

Average mass of an apple is between 60 g to 200 g It is not greater than this.

We can take an average mass, m =130 g

This average mass approximation would not affect the final answer.

The work done in lifting any object is given by:

W = m g h

Where, m is the mass of the object, g is the acceleration due to gravity and h is the height to which the object is lifted.

It is given that, h = 1 m

g = 9.8 m/s²

m = 130 g = 0.13 kg

⇒W =0.13 kg×9.8 m/s²×1 m = 1.3 J ≈ 1 J

Thus, the work done in lifting an apple one meter near Earth’s surface is approximately 1 J