1.A worker stands still on a roof sloped at an angle of32 above the horizontal. He is prevented from slipping by a static frictional force of480N. Find the mass of the worker

2.As preparation for this problem, review Example 13. Note that the numbers here are different from that example. A jet plane is flying with a constant speed along a straight line, at an angle of 30.0 above the horizontal, as shown in part (a) of the drawing. The plane has a weightof magnitude81800N, and its engines provide a forward thrust. In addition, the lift force(directed perpendicular to the wings) and the forceof air resistance (directed opposite to the motion) act on the plane. Part (b) of the drawing shows the free-body diagram of the plane. The air resistance has magnitude57500N. What are(a)the thrust and(b)the lift?