Question

1)Define Newton laws of motion
2)Explain the types of inertia with examples
3Define electric current and define it's unit
4)Define potential difference and define it's unit​

Answer 1

Answer:

1) Newton's laws of motion are three laws that describe the relationship between the motion of an object and the forces acting on it. The first law states that an object either remains at rest or continues to move at a constant velocity, unless it is acted upon by an external force.

2) While standing in a bus, we fall backward if the bus starts suddenly. Inertia of motion: The tendency of a body to remain in its state of uniform motion in a straight line is called inertia of motion. Example: When a running horse stops suddenly, the person sitting in it falls forward.

3) An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space. ... The SI unit of electric current is the ampere, or amp, which is the flow of electric charge across a surface at the rate of one coulomb per second.

4) The S.I Unit of potential difference is volt (V). 1 volt =One volt is the potential difference between two points in a current carrying conductor when 1 joule of work is done to move a charge of 1 coulomb from one point to the other.

Explanation:

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Answer 2

Questions & answers:-

1)Define Newton laws of motion?

Newton's first law of motion:

An object at rest will remain at rest and an object in motion will remain in motion at constant velocity unless acted upon by an unbalanced force.

Newton's second law of motion:

The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

"Force = Mass × Acceleration."

Newton's third law of motion:

Every action, there is an equal and opposite reaction.

2)Explain the types of inertia with examples?

Firstly you have to know what is Inertia:

Inertia is the resistance of any physical object to any change in its position and state of motion. This includes changes to the object's speed, direction, or state of rest. Inertia is also defined as the tendency of objects to keep moving in a straight line at a constant velocity.

Types of Inertia & explanation:

(1)Inertia of rest: The inability of a body to change by itself its state of rest is known as Inertia of Rest.  

Examples:  

Person sitting in a car falls backwards, when the car suddenly starts. It is because the lower portion in contact with the car comes in motion where as the upper part tries to remain at rest due to inertia of rest.

(2)Inertia of motion: The Inability of a body to change by itself its state of uniform motion is known as Inertia of motion.

Examples:

(i) When a moving car suddenly stops the person sitting in the car falls forward because the lower portion of the body in contact with the car comes to rest whereas the upper part tends to remain in motion due to inertia of motion.  

(ii) An athlete runs a certain distance before taking a long jump because the velocity acquired by running is added to the time of jump, so that it can cover a long distance.

(3)Inertia of direction:

The inability of a body to change by itself its direction of motion.  

Examples:

When a car moves round a curve the person sitting inside is thrown outwards in order to maintain his direction of motion due to inertia of motion.

3)Define electric current and define it's unit?

Electric current is basically the flow or charge of the electric charge in motion in a conductor. It is said to exist when there is a net flow of charge through the region.

the current is given as the flow of charge per second:

I = charge / time    

The SI unit of current is Ampere.

4)Define potential difference and define it's unit?

Potential difference is defined as the difference between the potentials at two point.

"Volt" is the SI unit of potential difference.

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