Learning Goal: To use the equations of equilibrium to analyze a system containing a wedge and to determine the necessary applied force to introduce motion into the system. The crate shown is held against wedge B by a spring. The spring is 94.5% of its original uncompressed length 12.50 m, and the spring constant is given as k=1450 N/m. The coefficient of static friction at all contacting surfaces is μ, = 0.120. The mass of the crate is m 28.0 kg. The angle is 0=10.0°. Neglect the mass of the wedge. Assume the crate only moves in the y direction and that wedge A cannot move.( Figure 1) Part A - Determining the normal force exerted by the crate on the wedge Determine the normal force No that the crate exerts on the wedge when the system is at rest. Express your answer to three significant figures and include the appropriate units. ▸ View Available Hint(s) ? Nc = Value Units Submit Part B - Finding the smallest horizontal force P to move the crate upward Determine the magnitude of the smallest horizontal force P that is necessary to begin moving the crate upward. Express your answer to three significant figures and include the appropriate units. ▸ View Available Hint(s) Figure 1 of 1 P = Value Units ་ Submit Provide Feedback ? Next >

The two gears in the picture below on the left are meshing together. The two gears in the picture on the right are stuck together and are on the same shaft. Which of these statements is true when the gears are turning? (There may be more than one correct answer). A. The two meshing gears have the same |?| B. The two gears on the same shaft have the same |?| C. The two meshing gears turn through the same magnitude of arc-length in the same time D. The two gears on the same shaft turn through the same magnitude of arc-length in the same time

Basic Conversions A solid flat disk is rotating in the counter-clockwise (or positive) direction. There is an object (small black dot) on the disk, rotating with the disk. The object is a distance 1.30 meters from the axis of rotation (the center of the disk). It had an angular velocity of 4.00 radians / second at the initial position of 0 Radians (see black line on image). After 1.57 seconds, it has an angular velocity of 7.00 radians / second at the position shown in the picture. O Radians What is the tangential linear acceleration as it has moved from the 0 position to the current position? Your answer should have the following: 2 Decimal Places Correct SI Units Appropriate Signs for Vector quantity answers Answers must be in the following format: Written out and NOT in scientific notation Acceptable: 278.40 Not Acceptable: 2.784 x 102 Your Answer: Answer units

System for shorter flight times With his invention, Håkan Lans has made it possible to shorten flight times. Thanks to his invention, a pilot can see the exact positions of other aircraft. ( what is the right answer? Registered design Logo Patent d. Copyright