How much force is needed to accelerate a #4.0# #kg# physics book to an acceleration of #2.0# #m##/##s^2#?

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Answer 1 · 2018-04-05T20:50:37

Force #=# #8.0kgm//s^2#

Force #=# mass x acceleration
Mass #=# #4.0kg#
Acceleration #=# #2.0m//s^2#
Hence,force #=# (#4.0#x#2.0#)#kgm//s^2#
#=# #8.0kgm//s^2#

Answer 2 · 2018-04-06T00:29:58

#8# newtons

We use Newton's second law of motion, which states that,

#F=ma#

#m# is the mass of the object in kilograms

#a# is the acceleration of the object in meters per second

And so, plugging in the values, we get,

#F=4 \ "kg"*2 \ "m/s"^2#

#=8 \ "N"#