Question

● Give reasons for the following :

(a) Why do leaves of a tree fall off when we shake it ?

(b)A carpet is beaten with a stick.

(c)Luggage is tied to the roof of a bus

(d)A person gets hurt while climbing a moving bus
OR
A person runs for sometime before getting into a moving bus

(e)A person gets hurt while getting off a moving bus.


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Answer 1

Explanation:

(a). Some leaves of a tree get detached when we shake its branches vigorously because branches comes in motion while the leaves tend to remain at rest due to inertia of rest.

(b)An object's inertia tends to resist any change in its state of rest or motion. If a carpet is beaten with a stick then the carpet begins to move. ... The dust particles remain in a state of rest, while the carpet moves, as per Newton's first law of motion. The particles of dust thus emerge from the carpet.

(c). 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.

(d). that injuries most frequently occur due to changes in acceleration of the bus. Un- expected changes in the flow of traffic often force drivers on suddenly braking.

(e)A man jumping out from a moving bus holds the inertia of motion. As the man lands on the ground, feet come to rest instantly while the upper part of the body continue to move due to inertia of motion. Therefore the person may fall forward

hope this will help u