Design a four-bar Grashof crank-rocker that provides limited rocker motion with quick-return action when being driven by a constant crank. The design specifications are:

The output rocker O4Q and must have length L4 = 100 mm, where O4 is pivoted to ground.

The output rocker must have 30° total range of motion, symmetrically about a vertical axis (i. e., 15° on each side).

The coupler with joint P connected to the crank and joint Q connected to the rocker must have length L3 = 150 mm.

The crank O2P must rotate at a constant speed  = 60 rpm.

The time ratio between forward and back action must be 1:1.2.

What are the characteristic crank angles, α,β, δ? What are the lengths of the ground link L1 and the crank connecting O2 and P, L2? Also, please provide two diagrams showing the linkage in each of its extreme positions separately. In other words, one diagram of the mechanism with the rocker as far counterclockwise as it can move, and another diagram of the mechanism with the rocker as far clockwise as it can move.

Please plot the rocker angle (theta 4) vs crank angle (theta 2) for two full crank revolutions (720 degrees) and plot the horizontal position coordinate x of Q v the crank angle (theta 2) for two full crank revolutions (720 degrees).

Which statement state a claim? check all that apply. (1) the driver education programs are often to sophomore’s at local high schools. (2) students should have a vision test before they can operate motor vehicles. (3) driving classes should i head instruction about the dangers of texting and driving. (4) mr. graber is the behind-the-wheel instructor at our high school. (5) behind-the-wheel courses ought to include driving time on local highways.

Create a purpose statement based on the graphic organizer in "section ii: finding the main point."

Asap plz which sentence from this excerpt of jefferson davis’s inaugural address indicates that secession was the confederacy’s way of reclaiming its legal powers? an agricultural people, whose chief interest is the export of a commodity required in every manufacturing country, our true policy is peace, and the freest trade which our necessities will permit . . there can be but little rivalry between ours and any manufacturing or navigating community, such as the northeastern states of the american union. it must follow, therefore, that a mutual interest would invite good will and kind offices. if, however, passion or the lust of dominion should cloud the judgment or inflame the ambition of those states, we must prepare to meet the emergency and to maintain, by the final arbitrament of the sword, the position which we have assumed among the nations of the earth. we have entered upon the career of independence, and it must be inflexibly pursued. through many years of controversy with our late associates, the northern states, we have vainly endeavored to secure tranquillity, and to obtain respect for the rights to which we were entitled. as a necessity, not a choice, we have resorted to the remedy of separation; and henceforth our energies must be directed to the conduct of our own affairs, and the perpetuity of the confederacy which we have formed. if a just perception of mutual interest shall permit us peaceably to pursue our separate political career, my most earnest desire will have been fulfilled. but, if this be denied to us, and the integrity of our territory and jurisdiction be assailed, it will but remain for us, with firm resolve, to appeal to arms and invoke the blessings of providence on a just cause . .