Question

A bicycle chain of length 1.6m and mass 1kg is lying on a horizontal floor. if g=10ms-2the work done in lifting it with one end touching the floor and the other end 1.6m above the floor is
1.10J
2.3.2J
3.8J
4.16J
​

Answer 1

Answer:

8J is your answer

Explanation:

apply

workdone = force × distance

so whenever the object is in contact with some other objects at the endpoints mass is divided in to equal parts

therefore

$workdone = force \: \times distance \\ = \frac{m}{2} \times g \times h \\ = \frac{1}{2} \times 10 \times 1.6 \\ = 8j$