a. The velocity of a point A of a solid body is equal to v and forms an angle of
45◦ with the direction of the straight line AB. The velocity of point B of this
body is u. Determine the projection of the velocity of point B on the direction
AB.
b. The velocities of points A and B of a solid body are equal to v. The velocity
of a point C in the plane of a straight line AB and a vector V is u > v. Find the
velocity projection of point C on the axis perpendicular to the specified plane.
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