Per NCERT §6.3, in a system on which no external force acts, the centre of mass does which?
AAccelerates uniformly under no force
BAlways remains exactly at the origin
COscillates back and forth periodically
DMoves at constant velocity (or stays at rest)
Answer & Solution
Correct answer: D. Moves at constant velocity (or stays at rest)
NCERT §6.3: F_ext = 0 ⇒ A_cm = 0 ⇒ V_cm constant. CM may be moving uniformly or at rest.
Related questions
Per NCERT Ex 6.1, three particles of mass 100 g, 150 g, 200 g sit at the vertices of an eqPer NCERT §6.2, when the origin of coordinates is chosen at the centre of mass, what does Per NCERT §6.1.1, a rigid body's general motion can be decomposed into which two kinds?Per NCERT §6.2 (continuous body), the CM of a continuous distribution is given by which inPer NCERT Example 6.3 (L-shaped uniform lamina), if all three identical squares have equalPer NCERT §6.4 (Newton's 2nd law for CM), if F_ext on the system is zero, the total linearPer NCERT §6.4, the total LINEAR MOMENTUM of a system of particles equals which?Per NCERT §6.3 eqn 6.11, the equation of motion of the centre of mass of a system of parti