Question

A rectangular wooden block, open from one side, is lying on a horizontal table. Different weights are kept in the box one-by-one. To establish relationship between weight of the block and the minimum force required to just move it using a spring balance, it is observed that the force required to just move the rectangular block is minimum when we put a weight of :
(a) 40 g wt
(b) 45 g wt
(c) 35 g wt
(d) 30 g wt

CBSE Class IX Science VSA (1 Mark)

Answer 1

(d) 30 g wt.   ..................