3. A worker pushes down along the handle of a cart of 20.0 kg mass with a force of 145 N. The handle makes an angle of 60.0" with the horizontal ground. If the coefficient of kinetic friction between the cart and the ground is 0.105, determine the magnitude of the acceleration of the cart (in m/s ). [4 marks] m1 4. Refer to the diagram to the right. Mass 1 (m, = 175 g) is on a table connected to a massless pulley, as shown. The coefficient of static friction between m, and the table is 0.240. What is the maximum mass (in kg) of my before m, starts sliding across the table? [4 marks]