Question

Some students are testing their knowledge of friction by pushing a block across horizontal surfaces. For the first test they push a block with 240 N across the surface with a coefficient of kinetic friction of 0.4 The block accelerates at a rate of 0.88 m/s find the mass of the block

Answer 1

$$ma=F-\mu mg$$

$$0.88m=240-(0.4)(9.8)m$$

$$m=50\ kg$$