Question

give reason for the following (i) luggage pleased on the roof of bus is tied with rope ​​(ii) when a branch of tree is shaken vigorously some of the leave drop down ​

Answer 1

Explanation:

a. While the bus is moving, luggage tends to remain in inertia of motion state. When the bus stops, the luggage tends to resist the change and due to inertia of motion it moves forward and may fall off. That's why it is advised to tie any luggage kept on the roof of a bus with a rope.

b. When we shake the branch of a tree the tree possesses a state of motion whereas the fruits and leaves tend to remain in state of rest. Due to this inertia of rest the fruits and leaves get detached from the branch and because of gravity it falls down.