Question

A large rock rests upon a rough horizontal surface. A bulldozer pushes on the rock with a horizontal force T that is slowly increased, starting from zero. In a graph with T along the x axis and the friction force f along the y axis, start at T = 0 and show the region of no motion, the point at which the rock is ready to move, and the region where the rock is moving. b) A block with weight w rests on a rough horizontal plank. The slope angle of the plank theta is gradually increased until the block starts to slip. Draw two graphs, both with theta along the x axis. In one graph, show the ratio of the normal force to the weight, N/W, as a function of theta. In the second graph, show the ratio of the friction force to the weight, f/w. Indicate the region of no motion, the point at which the block is ready to move, and the region where the block is moving.

Answer 1