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What do you mean by the term weightlessness? |
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Answer» Solution :`(i)` Freely falling objects experience only gravitational force. As they fall freely , they are not in contact with any surface (by neglecting air friction). The NORMAL force acting on the object is zero. `(ii)` The downward acceleration is EQUAL to the acceleration DUE to the gravity of the EARTH. i.e. `(a=g)` `(iii) a=g :. N=m(g-g)=0`. `(iv)` This is called the state of weightlessness. `(v)` EG. When the lift falls (when the lift wire cuts) with downward acceleration `a=g`, the person inside the elevator is in the state of weightlessness. |
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