Q3 A trolley of mass 80 kg is being pulled by along a horizontal path. Figure 3.1 shows the force, T, exerted on the trolley and the frictional force, F, acting between the trolley and the path. The acceleration due to gravity is 9.8 m/s². cos 37° = 0.798 and sin 37° - 0.602. (Please note: You should write all your answers to three decimal places.) T 37° F Figure 3.1. (i) In order to keep the trolley moving at a constant speed of 0.85 m/s, a force of 120 N is exerted at an angle of 37° to the horizontal. Calculate the frictional force, F. (ii) Calculate the kinetic friction coefficient. (iii) Calculate the work done to pull the trolley a distance of 75 m. (iv) After travelling 75 m, the trolley is no longer pulled. Explain why the trolley continues to roll forward and calculate the distance you would expect the trolley to travel. State any assumptions you have made in determining this distance.

Q3 A trolley of mass 80 kg is being pulled by along a horizontal path. Figure 3.1 shows the force, T, exerted on the trolley and the frictional force, F, acting between the trolley and the path. The acceleration due to gravity is 9.8 m/s². cos 37° = 0.798 and sin 37° - 0.602. (Please note: You should write all your answers to three decimal places.) T 37° F Figure 3.1. (i) In order to keep the trolley moving at a constant speed of 0.85 m/s, a force of 120 N is exerted at an angle of 37° to the horizontal. Calculate the frictional force, F. (ii) Calculate the kinetic friction coefficient. (iii) Calculate the work done to pull the trolley a distance of 75 m. (iv) After travelling 75 m, the trolley is no longer pulled. Explain why the trolley continues to roll forward and calculate the distance you would expect the trolley to travel. State any assumptions you have made in determining this distance.