Newton's first law of motion is essentially a statement of:
AConservation of momentum
BInertia of a body
CEquivalence of mass and energy
DAction–reaction symmetry
Answer & Solution
Correct answer: B. Inertia of a body
1. The first law says a body remains at rest or in uniform motion unless an external force compels it to change that state.
2. This property of a body to resist change in its state of motion is called inertia.
3. Hence the first law is, in essence, a statement of inertia.
_Source: NCERT Class 11 Physics Ch 4 "Laws of Motion", §4.4 Newton's First Law, p. 51_
Related questions
A constant force of 6 N acts for 4 s on a 2 kg body initially at rest. The kinetic energy A stone of mass 0.5 kg is whirled in a horizontal circle of radius 1 m at constant angularA car of mass 1000 kg accelerates from rest to 20 m s⁻¹ in 5 s on a level road. The net hoA man weighing 50 kg jumps off a stationary boat of mass 250 kg into water with a horizontNewton's third law states that 'action and reaction are equal and opposite'. The most accuTwo identical billiard balls strike a smooth rigid wall with equal speeds u. Ball A strikeA force F acts on a particle making an angle θ with its instantaneous velocity. The componA cricketer draws his hands back while catching a fast ball. The physical reason is that: