block is sliding with a speed of 4.50 m/s on a smooth horizontal surface when, at point P, itounters a rough section. On the rough section, the coefficient of friction is not constant, but starts at00 at point P and increases "linearly" with distance past point P, reaching a value of 0.600 at 12.5mast point P.(a) Use the Work-Energy theorem to find how far this box slides before stopping,(b) What is the coefficient of friction at the stopping point?(c) How far would the box have slid if the friction coefficient did not increase, but instead had aconstant value of 0.100?Answers: (a) 5.11m(b) 0.304 (c) 10.3m5. A 15.0kg stone slides down a snow-covered hill (h = 20.0m high) leaving point A with a speed of10.0m/s. The width, w, of the hill at its base is 15 Om There is no friction on the hill between point A andpoint B (at the bottom of the hill), but there is friction on the level, horizontal ground at the bottom of thehill, between point B and a wall. After entering the rough ground region, the stone travels 100m andthen runs into a very long, light spring ( k= 2.00N/m) attached horizontally to the wall. The coefficientsof friction between the stone and horizontal ground are: us = 0.800 and uk = 0.200.StoneA(a) What is the speed of the stone when it reaches point B?(b) Will the stone move again after it has been stopped by the spring?hAnswers: (a) 22.2 m/s(b) No.springw6. Jane, whose mass is 50.0 kg, needs to swing across a river filled with crocodiles in order to rescueTarzan, whose mass is 80.0 kg. However, she must swing into a constant horizontal wind force, F, on avine that is initially at an angle of 0 with the vertical. In the figure, D = 50.0 m, F = 110 N, L = 40.0 m,and 0 = 50.0°. Note: Tarzan's ledge is a small distance above the end of the vertically hanging rope,since the rope swings on an arc.(a) With what minimum speed must Jane beginher swing in order to just make it to the other side?(Hints: Tarzan is higher than the lowest point ofthe swing. Also, the wind force is constant.s WindiJane(b) Once the rescue is complete, Tarzan and Janemust swing back across the river. With whatminimum speed must they begin their swing?Tarzan

Answered: Image /qna-images/answer/0547f318-9f1c-4837-96a8-70651d4ae043.jpg

lock is sliding with a speed of 4.50 m/s on a smooth horizontal surface when, at point P, it ounters a rough section. On the rough section, the coefficient of friction is not constant, but starts at 00 at point P and increases "linearly" with distance past point P, reaching a value of 0.600 at 12.5m ast point P. (a) Use the Work-Energy theorem to find how far this box slides before stopping. (b) What is the coefficient of friction at the stopping point? (c) How far would the box have slid if the friction coefficient did not increase, but instead had a constant value of 0.100? Answers: (a) 5.11m (b) 0.304 (c) 10.3m

lock is sliding with a speed of 4.50 m/s on a smooth horizontal surface when, at point P, it ounters a rough section. On the rough section, the coefficient of friction is not constant, but starts at 00 at point P and increases "linearly" with distance past point P, reaching a value of 0.600 at 12.5m ast point P. (a) Use the Work-Energy theorem to find how far this box slides before stopping. (b) What is the coefficient of friction at the stopping point? (c) How far would the box have slid if the friction coefficient did not increase, but instead had a constant value of 0.100? Answers: (a) 5.11m (b) 0.304 (c) 10.3m

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A 50.0 kg extreme snowboarder slides down the side of a mountain that is inclined at an angle of 51.8 above the horizontal. The snowboarder starts from rest at the top of the incline, which is 147 m vertically above the bottom of the incline. (a) What is the mechanical energy at the top and the bottom of the incline? Note: one of these will be a numerical value and the other will just be symbolic. (b) If the coefficient of kinetic friction between the snowboard and the snow is 0.975 and the total work done by friction is – 5.53 × 104 J, then what is the speed of the snowboarder at the bottom of the incline? You must use energy methods in order to get full credit for this problem and include a diagram of the situation.
Ms. Dewitte's son, Theo, slides down a slide, from rest, with a length of 2.00 m at an incline of 50° above the horizontal. He has a mass of 22.0 kg and he reaches the bottom of the slide with a velocity of 2.90 m/s. Briefly explain if total mechanical energy was conserved and what energy transfers otcurred?
A 3 kg block is pushed along a horizonal surface by a constant force of magnitude 46 N that is acting 30⁰ above the horizontal. The blocks moves a distance of 1.3 m and the coefficient of kinetic friction is 0.25. Determine the c.)the work done by gravity and d.) the work done y normal force. Show solution and graph(FBD).
Work
A skier, starting from rest, coasts down a mountain that makes an angle of 20.0 ° with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.167. She coasts for a distance of 13.5 m before coming to the edge of a cliff. Use the Work-Energy theorem to find her speed at the edge of the cliff.
A 1400-NN crate rests on the floor. How much work is required to move it at constant speed 5.0 mm vertically. Express your answer to two significant figures and include the appropriate units.
A block of mass m=1.5kg is released from rest at an unknown height h. The coefficient of friction between the block and the incline oriented at an angle of 0=56° is Hk=0.21. If the speed of the block v=4.1m/s when it leaves the inclined plane, determine the work done by the force of gravity. Take g =9.81m/s? and express your final result using one decimal place. m m
A crate with a mass of 155 kg, starting from rest, slides down a ramp making an angle of 32 degrees with respect to horizontal. The ramp is 6 meters long. A constant frictional force of 200 N acts throughout the motion and a force Fis being applied by a rope as shown to prevent the block from sliding too fast. If the force Fis such that the block will move with constant speed, v= 0.1 m/s, down the ramp. Determine the work, in newton meter, done by the force F if the block travels the length of the ramp. Use 9 = 9.8 m/s
Solve it correctly please. I will rate accordingly
A block of mass m is on an inclined ramp. The ramp makes anangle θ with respect to the horizontal, as shown. The ramp hasfriction, with coefficient of kinetic friction μk and static friction μs.This experiment takes place on earth.The block has an initial speed of v up the ramp. It travels adistance d along the ramp before it stops.Answer using variables, please d) Calculate the work done by the Friction force as the block travels the distance d.Is it positive, negative, or zero?e) If the block comes to rest, how far has it travelled?Use the work-energy principle and your results of parts b), c), and d).f) Briefly (one sentence) explain why this problem could not be solved using conservation ofenergy.
A 0.300 -[kg] box starts at rest at point A and slides down a circular track making a trajectory given by the solid line. At point B, where its velocity vB is 8.67[m/s], the cart enters another circular track of smaller radius that has friction until it reaches a veloc- ity of 4.00 [m/s] at point C. What is the total work done on the object as it moves from point A to point C?
A 7.80 g bullet is moving at 460 m/s just before it penetrates a tree trunk to a depth of 4.9 cm (ay What the magnitude of the average frletional force (In N) that is exerted on the bullet whille moving the tree trunk? Uso work considerations to o your answer. (b) Asturing the frictional force is constant, how much time elapses between the moment the bullet enters the tree trunk and the moment it moving?