Q.5 An external force of magnitude F = 5N is applied
vertically downward on an object
of 10 N weight resting on
horizontal surface. The magnitude
of the normal force ñ exerted by
the ground on this object is:
a
mg
(a)n = 5N
(b) n = 17 N
(c) n = 15 N
(d) n = ON