Find the reactions at contact points A, B, and C, given: F = 85 lbs, L, = 0.8 ft, L2 = 1.6 ft, L3 = 3.1 ft, e = 30°, = 26° NA = Number Ibs (enter a positive number) NB = Number Ibs (enter a positive number) %3D Nc = Number Ibs (enter a positive number) %3D

Part I. Shorter problems focused on the fundamentals a. For the image at the right, the coordinate angles are a = 57°, ẞ= 121°, y=49°, and the point along a-a is (15,-6,3). What is the angle between lines a-a and b-b? Z b-b B LL F a (x,y,z) a-a Y b. If the magnitude of the force, F-3121bf, what is the magnitude projected along the a-a axis? y

3. Determine the displacement of an eight-cylinder engine having a bore of 3.25 in and a stroke of 3 in.

The figure shows the chain drive of a bicycle. How far will the bicycle move if the pedals are rotated through 180°? Assume the radius of the bicycle wheel is 12.7 inches. The bicycle will travel approximately (Round to the nearest tenth.) in. C -1.95 in 4.21 in