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Newton’s First law of motion is considered one of the most asked concept.
4 Questions around this concept.
A block is kept on a frictionless inclined surface with an angle of inclination . The incline is given an acceleration to keep the block stationary. then a is equal to
Newton’s 1st law of motion states that if the (vector) sum of all the forces acting on a particle is zero, then and only then does the particle remains unaccelerated, i.e., remains at rest or move with constant velocity.
If Fnet=0 ⇒ anet=0 ⇒ forces in all directions are zero,i.e,
Newton’s first law is also called the law of inertia.
Newton’s laws are valid in an inertial frame of reference but are not valid in a non-inertial frame of reference.
Frame of reference
A frame of reference is a system of coordinate systems and clocks.
Types of frame of reference:
Inertial frame of reference- A frame which is at rest or moving with uniform velocity.
Example- 1. Car moving with velocity v on a straight road.
2. Lift at rest.
2. A non-inertial frame of reference- frame which is accelerated and does not have a constant velocity.
Example- 1. The frame traveling in a straight line but speeding up or slowing down.
2. The frame traveling along a curved path.
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