A uniform chain of mass m and length I is lying on a slippery table. When one quarter of its length hangs over the edge, the chain begins to slip off. How fast is it moving when the last bit of it slips off the table? Ignore friction. 16gl 15 15gl 32 15gl 16 gl 32
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- A uniform chain of mass m and length l is lying on a slippery table. When one quarter of its length hangs over the edge, the chain begins to slip off. How fast is it moving when the last bit of it slips off the table? Ignore friction. 16gl 15 15gl 32 15gl 16 gl gl 32A 550.0 g bird is flying horizontally at 2.50 m/s, not paying much attention, when it suddenly flies into a stationary vertical bar, hitting it 25.0 cm below the top. The bar is uniform, 0.700 m long, has a mass of 1.50 kg kg, and is hinged at its base. The collision stuns the bird so that it just drops to the ground afterward (but soon recovers to fly happily away). A- What is the angular velocity of the bar just after it is hit by the bird? Express your answer in radians per second. W1 = rad/s B- What is the angular velocity of the bar just as it reaches the ground? Express your answer in radians per second.A 0.5-kg stone slides down a frictionless bowl, starting from rest at the rim. The bowl itself is a hemisphere of radius 0.100 m. Just as the stone reaches the bottom of the bowl, how fast is it moving?
- Please solve this correctlyA 17 gg audio compact disk has a diameter of 12 cm. The disk spins under a laser that reads encoded data. The first track to be read is 2.3 cm from the axis; as the disk plays, the laser scans tracks farther and farther from the center. The part of the disk directly under the read head moves at a constant 1.2 m/s. When a disk is inserted, it takes 2.4 s to spin up from rest. What is the torque of the motor?A bowling ball (which we can regard as a uniform sphere) has a mass of 7.26 kg and a radius of 0.216 m. A baseball has a mass of 0.145 kg. If you connect these two balls with a lightweight rod, what must be the distance between the center of the bowling ball and the center of the baseball so that the system of the two balls and the rod will balance at the point where the rod touches the surface of the bowling ball?
- 4 spheres, each of diameter D= 0.05 m (spheres are identified as 1, 2, 3, 4), are placed on the end of 4 rods of length L = 0.15 m, arranged in a cross pattern as shown in the figure. L The rigid assembly is free to pivot without friction about the axis, o, normal to the page. Sphere 1 is covered with roughness of height ɛ = 0.25 mm while all other spheres are smooth. 1 With an oncoming velocity of U= 60 m/s, which direction will the assembly rotate? (Clockwise or counterclockwise). Use appropriate calculations to explain and justify your answer. Density of air is 1.2 kg/m³ and viscosity is 1.5 x 10-5 m²/s. 3.A bicycle racer is going downhill at 12.9 m/s when, to his horror, one of his 2.27 kg wheels comes off when he is 80.0 m above the foot of the hill. We can model the wheel as a thin-walled cylinder 85.0 cm in diameter and neglect the small mass of the spokes. Part A How fast is the wheel moving when it reaches the foot of the hill if it rolled without slipping all the way down? Η ΑΣΦ V₁ = 28.0 ? m/s Submit Previous Answers Request Answer × Incorrect; Try Again Part B How much total kinetic energy does the wheel have when it reaches the bottom of the hill? ΜΕ ΑΣΦ Ke 1780 Submit Previous Answers Request Answer × Incorrect; Try Again ? JChapter 11, Problem 066 GO Your answer is partially correct. Try again. In the figure, a small 0.109 kg block slides down a frictionless surface through height h = 1.46 m and then sticks to a uniform vertical rod of mass M = 0.218 kg and length d = 1.55 m. The rod pivots about point O through angle e before momentarily stopping. Find 0. Number Units (degrees) em the tolerance is +/-2% em Click if you would like to Show Work for this question: Open Show Work
- L A uniform beam with mass M = 179.0 kg and length L = 3.2 m slides broadside down along the ice at a speed of vo = 12.0 m/s. A man of mass 99.0 kg, who is initially at rest grabs one end of the beam as it goes past and hangs on as the beam and man go spinning down the ice. Note: You can assume frictionless motion and the moment of inertia for the man about a vertical axis through his center of mass is negligible. Use the coordinate system shown in the picture, with the origin located at the initial position of the man and the z axis pointed out of the page. 1) During the beam/man collision, which of the following qualities about the man/beam system are conserved (circle all that are correct): a) Linear momentum b) Angular momentum c) Rotational kinetic energy d) Mechanical energy e) None of the above. 2) After the collision, what is the moment of inertia of the man + beam system about an axis perpendicular to the ice through the center of mass of the system? 3) After the collision, at…A = 3 B= 9 C= 6 D = 8A kid's merry-go-round in a park is a thin 150 kg disk (I = ½ MR2) with a radius of 3 m mounted to rotate freely about a central axis. On the edge of %3D the disk is an essentially massless bar. A 25 kg child jumps onto the bar (tangentially to the outer rim of the disk) at a speed of 12 m/s and a distance of 3 m from the rotation axis. If we think of the child as being essentially a point mass, what is the angular velocity of the system after the collision?