Question

Where does the center of gravity lie, when a boy is doing sit-ups?​

Answer 1

When a boy is doing sit-ups, the center of gravity keeps moving up and down. Thus the centre of gravity is not fixed while doing sit-ups. It keeps changing as the boy stands up or sits down

Answer 2

Explanation:

When a boy is doing sit ups, the centre of gravity keeps moving up and down.Thus the centre of gravity is not fixed while doing sit ups.It keep changing as the boys stand up or sit down.

I hope it will help you .