An electric turntable 0.790 m in diameter is rotating about a fixed axis with an initial angular velocity of 0.300 rev/s. The angular acceleration is 0.913 rev/s². 2a. Write a complete list of knowns and unknowns, and use them to label a diagram that illustrates the system. 2b. Compute the angular velocity after 0.192 s. 2c. Through how many revolutions has the blade turned in this time interval? 2d. What is the tangential speed of a point on the tip of the blade at that time (0.192 s)? 2e. What is the magnitude of the resultant acceleration of a point on the tip of the blade at that time?
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- 2. A bead on a wire can slide with negligible friction on a hoop with radius R rotating at a constant rate with a period T. а. Find the angle 0 at which the bead would not slide on the hoop. Express this in terms of the values given above and any constants (e.g. g). Note: A FBD and proper setup of NII equations are required here. Do your algebra. b. If the period increases, will the bead slide upward, slide downward, or do neither? Explain why, using your result from part a. Can 0 be greater than or equal to 90°? Why or why not? Use FBDS and your result С. from part a as evidence. d. Are there any other angles at which the ball will not slide on the hoop? Explain why. Note: Think very carefully about your forces here. Use FBDS.AConsider an annular disk rolling down an inclined plane. The annular disk has mass 154 [g], inner radius 8.00 [cm] and outer radius 12.0 [cm]. The inclined plane has a slope that forms an angle of 44.6° with the ground. A. Suppose that the coefficient of static friction ?s is large enough so that the annular disk rolls without slipping. What is the magnitude of the translation acceleration felt by the annular disk's center of mass in the direction parallel to the slope? B. What is the minimum value that the coefficient of static friction ?s must take so that the annular disk rolls without slipping?
- In a charming 19th-century hotel, an old-style elevator is connected to a counterweight by a cable that passes over a rotating disk 2.00 m in diameter (Figure 1). The elevator is raised and lowered by turning the disk, and the cable does not slip on the rim of the disk but turns with it. Part A At how many rpm must the disk turn to raise the elevator at 35.0 cm/s? Express your answer in revolutions per minute. Nνα ΑΣφ W = rpm Part B Figure 1 of 1 To start the elevator moving, it must be accelerated at g. What must be the angular acceleration of the disk, in rad/s? Express your answer in radians per second squared. Πν ΑΣφ ? Disk a = rad/s? Counterweight Part C ElevatorA laser beam aimed from the earth is swept across the face of the moon. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Rotation of a compact disc. Part A If the beam is rotated at an angular velocity of 1.65 x 10 rad/s, at what speed does the laser light move across the moon's surface? (See Appendix E in the textbook for the moon's orbital radius.) Express your answer with the appropriate units. HẢ Value Units Submit Request Answer Part B If the diameter of the laser spot on the moon is 5.85 km, what is the angle of divergence of the laser beam? Express your answer in radiansPhysics Please help me with these physics homework questions. It will help me understand much better
- An 800kg roller coaster traveling at 10m/s is 80m above the bottom of the track. a. How fast is the roller coaster car traveling at the bottom of the hill? b. How fast is the roller coaster car traveling at the top of the loop?A proton's speed as it passes point A is 6.00x10* m/s. It follows the trajectory shown in the figure. (Figure 1) Part A You may want to review (Page 687) For help with math skills, you may want to review: What is the proton's speed at point B? Mathematical Expressions Involving Squares Express your answer with the appropriate units. For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Capacitor plates. Value Units Submit Request Answer Provide Feedback Figure 30 V 10 V -10 Vn IT'S ARMAGEDDON! A Texas sized asteroid is headed for Earth! You've been hired by NASA to be part of a misfit team of deep-core drillers to save the planet! As the engineer (and most educated person) on the team, you've been tasked with doing the calculations to make sure the Earth will be saved. The plan is to land on the 6.1 x 10²1 kg asteroid traveling at 9830 m/s and detonate a nuclear bomb. The asteroid will break into two pieces of equal mass. One piece will fly off at an angle of 30° and speed 9700 m/s. What will be the speed and angle of the second piece? Scientists estimate that as long as the angle is greater than 15° we're all gonna be alright! Note: This is a totally ridiculous scenario, but the movie made a lot of money and had a lot of famous people in it. Typical Hollywood, right? Note 2: I made up the numbers, but they're close to what the movie describes. m/2,v2 0 m/2, v1 m, vi
- A 5.0-m-diameter merry-go-round is turning with a 3.5 s period. Part A What is the speed of a child on the rim? Express your answer in meters per second.Please answer in 30 min. I will upvote.I've gone through like 4 pages trying to figure this out and i keep getting nonsensical answers. Help would be greatly appreciated!