An object with a mass of #7 kg# is on a surface with a kinetic friction coefficient of # 8 #. How much force is necessary to accelerate the object horizontally at # 1 m/s^2#?

1 Answer
May 10, 2018

Answer:

#"555.8 N"#

Explanation:

On a frictionless surface

#"F = ma"#

Here, surface is rough. So, an additional force is required to have same acceleration #"a"#. This additional force is called frictional Force.

#"F = ma + μmg"#

#"F" = ("7 kg × 1 m/s"^2) + (8 × "7 kg × 9.8 m/s"^2) = "555.8 N"#