A block has acceleration #a# when pulled by a string. If two identical blocks are glued together and pulled with twice the original force, what will their acceleration be?

1 Answer
Nov 4, 2015

Acceleration of two blocks with twice the force will be the same #a#.

Explanation:

From the Second Law of Newton for an object of mass #m#, if the force #F# is applied, the acceleration will be
#a = F/m#

If two identical blocks are glued together, their mass will be #2m#. With the force equal to #F# the acceleration will be
#(2F)/(2m) = F/m = a#