Question

85. An iron block at sides 50 cm x 8 cm x 15 cm has
to be pushed along the floor. The force requlred
will be minimum when the surface in contact with
ground is
(a) 8 cm x 15 cm surface
(b) 50 cm x 15 cm surface
d) 8 cm x 50cm surface
(d) force is same for all surfaces​

Answer 1

8cm×15cm surface  

50cm×15cm surface

8cm×50cm surface

force is same for all surface

Answer :

D

Solution :

Force will be same for all the surfaces.