In the figure the pulley has negligible mass, and both it and the inclined plane are frictionless. Block A has a mass of 1.4 kg, block B has a mass of 2.7 kg, and angle is 35 °. If the blocks are released from rest with the connecting cord taut, what is their total kinetic energy when block B has fallen 25 cm? B
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- rrrA solid spherical jewel rolls smoothly from rest down a ramp. The jewel descends a vertical height of 1.2m to reach the bottom of the ramp. The previous question asked "What is the jewel's speed at the bottom of the ramp?" Hint: This problem has nothing to do with elasticity as we did not formally cover that topic. All elastic energy terms are zero. List all terms that had a value of zeroA smooth block is set at the top of a smooth track. There is no friction between the block and track. We would like the block to make its way through the entire track, and so it must stay on the track as it goes through the circular loop section. The block starts at rest, and the Radius of curvature for the loop is 10 meters. Use g = 9.8 m/s?. What is the minimum starting height H for the block if it is to make it through the loop while still staying on the track? Hint: At the top of the loop the Normal force will be zero in this situation. This is because we want a starting height that will give us just enough speed at the top of the loop to follow the circular path, no more, no less. H=? RPart D: What is the ratio of the kinetic energy to the potential energy when it is at 0.143m from equilibrium? Part E: Draw a graph with kinetic energy, potential energy, and total mechanical energy as functions of time.
- 2 Your answer is partially correct. Try again. In the figure the pulley has negligible mass, and both it and the inclined plane are frictionless. Block A has a mass of 1.0 kg, block B has a mass of 2.2 kg, and angle e is 27 °. If the blocks are released from rest with the connecting cord taut, what is their total kinetic energy when block B has fallen 21 cm? Number 2.47 Units the tolerance is +/-2% Click if you would like to Show Work for this question: Open Show Work SHOW HINT LINK TO TEXT LINK TO SAMPLE OBLEM LINK TO SAMPLE PROBLEM LINK TO SAMPLE PROBLEM VIDEO MINI-LECTURE 10:37 PM search ENG 4/4/2021 17 12 1home 3. 4 9. 7. 8. R. T. 00A 55kg painter ascends a 12kg ladder. The painter begins to slip when she is 70% up the ladder. What is μs between the ladder and floor? (Assume wall is frictionless)10, What is the minimum height h för which the block will reach point A on the loop without leaving the track? Correct, computer get8: 5.00E+01 m 11 A small block of mass m, which weighs 7.154 N, is hit so that it slides up a frictionless inclined plane. The surface of the inclined plane is at an angle 0 relative to the horizontal. Just after the mass is hit it has a speed of 12.80 m/s. The mass slides up the incline and travels a distance D along the incline before starting to slide back down. Find the work done by gravity on the block from its starting position up the ramp over the distance D. (Use g = 9.80 m/s?.) Answer: Submit All Answers It takes a minimum distance of 48.96 m to stop a car moving at 12.0 m/s by applying the brakes (without locking the wheels). Assume that the same frictional forces apply and find the minimum stopping distance when the car is moving at 27.0 m/s. 12.
- Needs Complete typed solution with 100 % accuracy.Energy conservation with conservative forces: A very small 100-g object is attached to one end of a massless 10-cm rod that is pivoted without friction about the opposite end. The rod is held vertical, with the object at the top, and released, allowing the rod to swing. What is the speed of the object at the instant that the rod is horizontal? 1.8 m/s 1.4 m/s 0.71 m/s 2.8 m/s 4.0 m/s fbbspherical R a vertical axis on frictionless bearings (see the figure above). A massless cord passes around the equator of the shell, over a pulley of rotational inertia I and radius r, and is attached to a small object of mass m. There is no friction on the pulley's axle; the cord does not slip on the pulley. What is the speed of the object when it has fallen a distance d after being released from rest? Use energy considerations. NOTE: Eoncono au ome of and
- In the figure the pulley has negligible mass, and both it and the inclined plane are frictionless. Block A has a mass of 1.3 kg, block B has a mass of 2.2 kg, and angle 0 is 32°. If the blocks are released from rest with the connecting cord taut, what is their total kinetic energy when block B has fallen 28 cm? Number Units B1. A roofer is dragging a 15.0 kg bundle of shingles up a roof at a constant speed. The roof is sloped at an angle of 30o with respect to the horizontal. a) Draw a free-body diagram of the forces involved b) What is the force component perpendicular to the roof of the weight of the bundles of shingles? show work. C ) What is the magnitude of the force of friction on the bundle of shringles as it is pulled up the roof if the coefficient of kinetic friction of the shingle bundle on the roof is 0.520? Show your work. d)Calculate the force parallel to the roof with which the roofers must pull on the rope to move the shringles at a constant speed up the roof.Answer to 3 significant digits. e) Suppose an astronaut was building a similar structure on Mars.What would be the force component perpindicular to the roof of the weight of a 15.0 kg bundle of materials on the surface of Mars? The mass of Mars is 6.42x1023kg and the radius of mars is 3.30x106 m. Answer to 3 significant digits.Taylore has a couch that she wants to move in Davidson Student Center's lounge, with mass 12.7 kg. The couch starts at rest. Taylore pushes with an 24.4 N force, and the object has a displacement of 11.2 m, directed 30.0° from the direction of the force. What is the final speed of the couch? Your Answer: Answer