Question

The weight of an object of mass 1 kg is equal to:
(A) 1 N
(B) 9.08 N
(C) 9.8 N
(D) 8.9 N

Answer 1

The weight of an object of mass 1 kg is equal to:

(A) 1 N

(B) 9.08 N

(C) 9.8 N

(D) 8.9 N

answer : option (C) 9.8N

explanation : according to Newton's 2nd law, F = ma

for getting weight of an object, acceleration = acceleration due to gravity.

i.e., weight , W = mg

here m is mass of the object and g is acceleration due to gravity.

given, m = 1kg , g = 9.8 m/s²

so, weight of the object = 1kg × 9.8 m/s²

= 9.8N