Question

While performing an experiment to establish relationship between weight of a rectangular wooden block lying on a horizontal table and the minimum force required to just move it using a spring balance, a student calculated the minimum force required as 180 g wt, to move the wooden block of 400 g wt. If he places another block of mass 100 g wt over it, the force required will :
(a) remain same
(b) decrease
(c) increase
(d) may decrease or increase

CBSE Class IX Science VSA (1 Mark)

Answer 1

(c) Force will increase.