Physics

. A 2_5\"I

1. 2. 3. 4. 5. A 25kg wooden plate is held in place by two strings attached to the ceiling and the wall. The string attached to the ceiling makes an angle 400 with the horizontal and the string attached to the wall makes 900 with the wall. Determine the force in each string. A block 4kg in mass rests on a horizontal plane. What value of horizontal force is required to (a) move the block. (b) maintain the motion of the block once it is moved? The coefficients of static and kinetic friction are 0.23 and O. 18, respectively. What will the force be, if the force is instead applied 250 above the horizontal? A block has a mass of 6kg andies/initi011Y on d plane inclined at 350. What value of force is required to stop the block from sliding if (a) the plane is frictionless, (b) the plane has coefficients of fractions static and kinetic equal to 0.20 and 0.18 respectively? What will the value of tne force >eif the velocity is constant and is directed upyard parallel the incline? In the figuIJ blockS A and B have masses 40 kg and 20 respectively. (a) Determine the minimum weight of block C t keep tA tfrom sliding. The static an&kinetic coefficient of frictions between block A Old the table are O. 18 and O. 15.- respectively; (b) What is theacceleration Of block A? A block of ass 5 kg sf6rfS to slide down a fricfinless plane, inclined at 29 as shown in figure 2. The bloc moves from restgfa the top. The length of the incline m. Find (a) the acceleration of the blockeond (b) its 5 kg 2.0 speed when it reaches bottom of the inclined.