. Write some important points on Newton's law
i. Force is a vector quantity, whose unit is Newton (N) or kg ms-² (in MKS) & dyne or gmcms-2(in CGS).
ii. The dimension of force is [ MLT-2].
iii. The second law of motion gives the magnitude and unit of force.
iv. The second law is obviously consistent with the first law as F = 0 implies a = 0. (for m = constant).