The chapter on laws of motion is vital for the NEET exam. The chapter has a weightage of 4.5 per cent, and since Physics is a difficult subject for many students, prioritizing high weightage chapters can help them score well in NEET Physics. Here in this blog, we are sharing video lectures on the topic Laws of Motion along with summary notes and previous year questions with detailed solutions.
Laws of Motion: Summary Notes
Aristotelian law states that an external force is required to keep a body moving. However, in order to overcome the frictional forces in solids and viscous forces in fluids that are always present in nature, an external force is required.
Linear Momentum (P)
A body’s linear momentum is the amount of motion it contains. Momentum It is a vector quantity that has the same direction as the velocity.
The law of Inertia
If the net external force is zero, a body at rest will remain at rest, and a body in motion will continue to move at a uniform velocity. This property of the body is referred to as inertia. Inertia is defined as resistance to change.’ A body does not change its state of rest or uniform motion unless compelled to do so by an external force.
Newton’s First Law of Motion
Newton’s first law of motion is the same as the law of inertia given by Galileo. According to newton’s first law, unless acted upon by an external force to change its state, a body remains in a state of rest or uniform motion. Newton’s first law of motion gives a qualitative definition of force as “that external cause which tends to change or actually changes the state of rest or motion of a body.”
The rate of change of momentum of a body is directly proportional to the external force applied to it and the change takes place in the direction of force applied.
To every action, there is an equal and opposite reaction. Examples: Swimming, Horse Pulling etc
Since action and reaction act on different bodies, they cannot be balanced. Both action and reaction take place at the same time. Forces always occur in pairs.
Mr Navajot Kumar leads the two sessions on the topic of the Laws of Motion. He is a NEET Physics subject matter expert. He has extensive NEET coaching experience, and his classes are taught in both English and Hindi.
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