Question #e8b1a

1 Answer
Antoine
May 3, 2015

I would choose:"by putting a second block on it"

Because, #Fr=muN#

where #Fr=# friction
#mu=# the coefficient of friction
#N=# the normal reaction of the floor(or surface)

#N=W(weight)# #=> Fr=muW#

#=> Fr# #alpha# #W#

That's why placing another block on it increases the weight and in the same way, the Frictional force.

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