Question

Give reason:
a) When a tree is shaken, its fruits and leaves fall.
b) If a balloon filled with air and its mouth untied, is released with its mouth in the downward direction it moves upward. ​

Answer 1

Answer:

a) when a tree is shaken the tree moves to and fro while the fruits and leaves remain in their state of rest on account of their inertia and thus fruits and leaves separate from the tree and fall from the tree.

b) If a balloon filled with air and its mouth untied is released with mouth in the downward direction, the balloon moves in the upward direction because the air present in the balloon rushes out in the downward direction. The equal and opposite reaction of downward going air pushes the balloon upward.