2.5 kg block is initially at rest on a horizontal surface. A horizontal force  of magnitude 5.8 N and a vertical force  are then applied to the block. The coefficients of friction for the block and surface are ?s = 0.38 and ?k = 0.23.   (a) Determine the magnitude of the frictional force acting on the block if the magnitude of  is 8.0 N.  N

A 75 kg skier grips a moving rope that is powered by an engine and is pulled at constant speed to the top of a 21 hit. The skier is pulled a distancez- 230 m along the incline and it takes 2.1 min to reach the top of the hill. Part A If the coefficient of kinetic friction between the snow and skis is 0.10, what horsepower engine is required df 30 such skiem (max) are on the rope at one time? Express your answer using two significant figures. VAE P- 22.75 Submit Previous Answers Bequest Answer ? X Incorrect; Try Again; 2 attempts remaining Beview Constants hp