A block of mass 2.5kg is pushed horizontally against a rough vertical wall with a constant force of 120N. The block is initially at rest and the coefficients of friction between the block and the wall are μs=0.40 and μk=0.30. Use g=9.8ms−2.
a. (i) Decide, with suitable calculations, whether the block will remain at rest or begin to slide.
b. (ii) If the block slides, find the magnitude and direction of its vertical acceleration.