NCERT Class 9 Science Solutions PDF Free Download In this post I have provided NCERT Solutions For Class 9 Science PDF Download. As every student know NCERT provide books for CBSE Board student and every CBSE board affiliated school follow the pattern of NCERT books and also preferred NCERT Solutions For Class 9 Science PDF […]
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There are many applications of Law of Motion. Some important applications are as under. The circular motion of a car on a flat and bank road are as (I) Circular Motion Of A Car On Level Road When a vehicle goes round a curved road, it requires some centripetal force. While rounding the curve, the
As we know that acceleration of a body moving in a circle of radius r and velocity v is v²/r directed towards the centre. i.e. a = v²/r For a stone rotated in a circle by a string, the centripetal force is provided by the tension in the string. For a car taking a circular
Whenever a body moves or tends to move over the surface of another body, a force comes into play which acts parallel to the surface of contact and opposes the relative motion. This opposing force is called friction. Let a wooden block place on a horizontal surface and give it a gentle push. The block
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In mechanics we encounter several kinds of forces. (I) Non-Contact Force The gravitational force is all pervasive. Every object on the earth experience the force of gravity due to Earth. It is a non-contact force. (II) Contact Force A contact force on an object arises due to contact with some other object solid, liquid or
According to this principle In the absence of an external force, the total momentum of a system remains constant or conserved and does not change with time. F (external) = 0 In an isolated system mutual forces between pairs of particles in the system causes Momentum change in individual particles. But as the mutual forces
Let we consider a man of mass m is standing on a weighting machine placed in an elevator or lift. The actual weight mg of the man acts on the weighting machine and offers a reaction R given by the reading of the weighting machine. This reaction R exerted by the surface of contact on
This law state that ” For every action, there is always an equal and opposite reaction. In simple terms, the third law can be e stated as follows Force in nature always occurs in pairs. Force on a body A by body B is equal and opposite to the force on the body B to
A large force acting for a short time to produce a finite change in momentum is called an impulsive force. Example: (I) Force exerted by a bat, while heating a ball. (II) Blow of hammer on a nail. Expression For an Impulse Let we consider a constant force F which acts on a body for
