A 50.0-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.549 and 0.328, respectively. What horizontal pushing force is required to (a) just start the crate moving and (b) slide the crate across the dock at a
constant speed?

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.