Question

a block of mass 2kg placed on a long frictionless horizontal table is pulled horizontally by a constant force F. If it moves a distance of 10m in the first two seconds,whatis the magnitude of F

Answer 1

since the table is frictionless,there is no opposing frictional force acting upon the block during its motion.

u=0 and t=2s and accn. of block a=F/m=F/2

then,

s=ut+1/2 at2

10=(0)2 +1/2 (F/2)(2)2

F=10N.

Answer 2

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