Part A Determine the velocity of the plate at the instant 0 = 30°, if at this instant the circular cam is rotating about the fixed point O with an angular velocity w = 4 rad/s and an angular acceleration a = 2 rad/s?. (Figure 1) Assume the direction to the right as positive. Express your answer to three significant figures and include the appropriate units. ? v = Value Units Part B Determine the acceleration of the plate at the instant 0 = 30°. %3D Express your answer to three significant figures and include the appropriate units. Figure < 1 of 1 ? HA a = Value Units 120 mm C 150 mm Next > w, a

In a roundabout (or traffic circle), cars go around a 23-m-diameter circle. Part A If a car's tires will skid when the car experiences a centripetal acceleration greater than 0.60g, what is the maximum speed of the car in this roundabout? Express your answer with the appropriate units. V= μA Value Units ?

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O Review Constants A flywheel with a radius of 0.230 m starts from rest and accelerates with a constant angular acceleration of0.670 rad/s Part A Compute the magnitude of the tangential acceleration, the radial acceleration, and the resultant acceleration of a point on its rim at the start. Express your answers in meters per second squared separated by commas. ΑΣΦ m/s², m/s², m/s² Man 一0ad to Aotal = Submit Request Answer

Part A An 88 kg person stands on a uniform ladder 4.0 m long, that weighs 90 N, as shown in the figure(Figure 1). The floor is rough; hence, it exerts both a normal force, f1, and a frictional force, f2, on the ladder. The wall, on the other hand, is frictionless; it exerts only a normal force, f3. Using the dimensions given in the figure, find the forces exerted on the ladder when the person is halfway up the ladder. Express your answers using two significant figures separated by commas. ? f1, f2, fa = kN Submit Request Answer Part B Find the forces exerted on the ladder when the person is three-fourths of the way up the ladder. Express your answers using two significant figures separated by commas. να ΑΣΦ ? f1, f2, f3 = kN Figure 1 of 1 Submit Request Answer Provide Feedback a-3.8 m mg

Part B An electric ceiling fan is rotating about a fixed axis with an initial angular velocity magnitude of 0.300 rev/s. The magnitude of the angular acceleration is 0.917 rev/s². Both the the angular velocity and angular accleration are directed counterclockwise. The electric ceiling fan blades form a circle of diameter 0.750 m. Through how many revolutions has the blade turned in the time interval 0.199 s from Part A? Express the number of revolutions numerically. ▸ View Available Hint(s) ΕΠΙ ΑΣΦ 0 回? Submit - Part C rev What is the tangential speed vt of a point on the tip of the blade at time t = 0.199 s ? Express your answer numerically in meters per second. ▸‣ View Available Hint(s) ΤΟ ΑΣΦ 0 m/s

What is the y component Fy of the resultant force?

Part E Find x-component of F = (20.0 N, 36.9° counterclockwise from the positive y-axis). Express your answer with the appropriate units. View Available Hint(s) Fx = Submit Part F Fy= μà Submit Value Find y-component of F = (20.0 N, 36.9° counterclockwise from the positive y-axis). Express your answer with the appropriate units. View Available Hint(s) µÅ Units Value ? Units ?

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Directions: Select the best answer for the following questions. Use g = 9.80 m/s2 and assume all numbers are accurate to 3 significant figures unless otherwise indicated.