A 1500 kg elevator, suspended by a single cable with tension 16.0 kN, measured to be moving upward at 3.6 m/s. Air resistance is negligible. Part A Is the elevator speeding up, slowing down, or moving at constant speed? ► View Available Hint(s) constant speed slowing down speeding up Submit Part B We want to find the elevator's speed after traveling upward 10.0 m. This could be solved with Newton's laws and kinematics, but we will use the energy principle. How much work does tension do on the elevator as it rises 10.0 m? Express your answer with the appropriate units. ► View Available Hint(s) WT = Submit 0 μÅ Value Units M

Suppose the force of air resistance is proportional to the speed of the object and in the direction opposite the object's velocity. If you throw an object upward, when is the magnitude of the object's acceleration highest? A. It is highest at the top of its trajectory. B The acceleration of the object is the same throughout the entire trajectory. No answer text provided. It is highest right after the object is released.

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We start with some review problems A crate of mass 42.0 kg rests on a level surface, with a coefficient of kinetic friction 0.257. You push on the crate with an applied force of 375 N. What is the magnitude of the crate s acceleration as it slides?     14.29 m/s^2     6.41 m/s^2     8.93 m/s^2     2.56 m/s^2

You have put a sonar device at the top of a frictionless inclined plane, as shown in the diagram below. That device allows you to measure the distance an object is from the device, as well as the speed and the acceleration of that object. If we decide that the origin (h = 0) is at the sonar device, we want to know what the height change is as we slide down the incline. 0 For an angle below the horizontal of 6.46, we see that our object has slid a distance 1.13 m, as measured along the incline itself. Calculate the height change in meters - and report your answer as a negative number. (This value would be useful for calculating the change in gravitational potential energy, as we will do in the lab.) h=o 10% O i 26 QUATU 99+ hp X 55 83°F 3:11 PM 10/16/2022 Ctrl 0

You place a crate of mass 26.3 kg on a frictionless 4.29-meter-long incline. You release the crate from rest, and it begins to slide down, eventually reaching the bottom 1.66 s after you released it. What is the angle of the incline?     18.5 degrees     22.2 degrees     26.6 degrees     20.4 degrees

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