Question

1. what do you mean by law of conservation of momentum.
.2. why is it dangerous to jump out of a moving bus.
3. what is a balanced force.​

Answer 1

Answer:

Explanation:

QUES:- what do you mean by law of conservation of momentum.

ANS:- One of the most powerful laws in physics is the law of momentum conservation. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

QUES 2:- why is it dangerous to jump out of a moving bus.

ANS:- 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. So, it is very dangerous to jump out of a moving bus.

QUES 3:-  what is a balanced force.​

ANS:- When forces are balanced there is no change in direction. Combined forces that are balanced are always equal to zero. ( combining vectors) Balance forces cannot change the motion or direction of an object. A balanced force keeps an object moving at a constant velocity.

Answer 2

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• It states that in the absence of any external force, the total momentum of any system of objects is always the same. This means that if no force acts on a body,then its final momentum is equal to initial momentum,the net momentum of the body remains unchanged or conserved.

• It is very dangerous to jump out of a moving bus. One can have a serious injury. This is because Law of inertia or Newton first law of motion. When we are travelling in bus our whole body is in motion but when we jump out,our lower part of body comes to rest but due to inertia of motion our upper part of body remains at motion. Hence, We fell down and got injured when we jump out of moving bus.

• If a Number of force are acting on the body and the body does not move then the forces are said to be Balanced Force. For example - Suppose a wooden block P is placed on the Horizontal table. Two strings are tied to the two opposite faces of the block. When a Pulling Force X is applied on one string,then the block begins to move to the right. Similarly,if the Force Y is applied on the other strings,the block moves to the left but if the block is Pulled from the both sides with equal forces, the block does not move.

EXPLORE MORE !!

There are three laws of motion.

• Newton's First law of motion - "A body Continues in its state of rest or uniform motion until a external balanced force acts on it".

• Newton's Second law of motion - "The rate of the change of momentum of body is equal to the force applied".

• Newton's Third law of motion- "To every action there is an equal and opposite reaction.,but action and reaction force act on different bodies."