A 25 kg child goes down a straight slide inclined 40 degrees above the horizontal. The coefficient of kinetic friction between the child's shorts and the slide is 0.25. A) Draw a free body diagram for the child on the slide in your written work. Indicate a useful coordinate system. B) What is the acceleration of the child as she goes down the slide?
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A 25 kg child goes down a straight slide inclined 40 degrees above the horizontal. The coefficient of kinetic friction between the child's shorts and the slide is 0.25.
A) Draw a free body diagram for the child on the slide in your written work. Indicate a useful coordinate system.
B) What is the acceleration of the child as she goes down the slide?
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- A dockworker applies a constant horizontal force of 87.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 11.5 m in a time of 5.30 s. You may want to review (Page). For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Determining force from acceleration. Part A What is the mass of the block of ice? Express your answer in kilograms. ► View Available Hint(s) m = Submit Part B 17 ΑΣΦ x = ? If the worker stops pushing after 5.30 s, how far does the block move in the next 4.80 s? Express your answer in meters. ► View Available Hint(s) — ΑΣΦ kg ? mA loop-the-loop section of a track is set up in a General Physics laboratory. A block is sliding on the surface of the track and passes through points A, B, C, D as shown in the diagram. Assume the track-block system has friction that is low enough it can be ignored. 1. 2. 3. Match the freebody diagram shown below with the forces exerted on the block at point B 4. A 5. D B сA horizontal (F = 12N) force pushes a block weighing (F, = 5.0N) against a vertical wall. The coefficient of static friction between the wall and the block is µg = 0.60, and the coefficient of kinetic friction is µk = 0.40. Assume that the block is not moving initially. %3D a) Draw a free body diagram of the block in the figure. b) What is the normal force (in unit vector notation) on the block from the walI? c) Will the block move? Please give your reason with calculation. d) In unit-vector notation, what is the force on the block from the wall?
- A man pushes on a piano with mass 160 kg ; it slides at constant velocity down a ramp that is inclined at 20 ° above the horizontal floor. Neglect any friction acting on the piano. Part A Calculate the magnitude of the force applied by the man if he pushes parallel to the incline. Express your answer with the appropriate units. HẢ ? F = Value Units Submit Request Answer Part B Calculate the magnitude of the force applied by the man if he pushes parallel to the floor. Express your answer with the appropriate units. HẢ Value Units %3DA person jumps forward with a take-off velocity of 1.90 m/s. At what take off angle is the member's jump's horizontal distance maximum? Identify the knowns and unknowns, and draw force diagrams for the problem.m РАMP3 ** F20 During the online physics lecture, students have presented the problem shown in the figure. The M is at rest on a surface with slope 0. The coefficients of static and kinetic friction are u and.. respectively, The falling hanging mass, m, is connected to the block via a light string using an ideal pulley. Calculate the minimum mass of the block, M, so that that system will remain at re Please use the following variables: M = 3.66 kg, 0 = 25.5°, H = 0.641, u = 0.529, g = 9.80 m/s (PAMP323F20) a) 04.03 kg b) 03.63 kg c) 05.84 kg d) 03.11 kg e) 03.24 kg
- Tommy is working on a physics problem and asks his friend Sarah to check his work. He is to draw a free body diagram for a man walking to the left and comes up with the following: He reasons, “The man is walking to the left, so the force of friction is acting in the opposite direction. The normal force should be opposite and equal to that of the gravitational force.” Is Tommy correct with his diagram and reasoning? If so, explain. If not, what mistake did he make? Communication throughout the test will also be evaluated on 1) rounding using significant digits, 2) proper use of units, 3) organization and neatness, and 4) showing all work2. A 3.00 kg block is placed at the top of a 21.0° rough inclined plane with us = 0.325 and Hk =0 .215 %3D and a length of 1.78 m. a) Draw a free-body diagram of the block. b) Prove that, if released from rest, the block will immediately start sliding. c) Find the magnitude of the block's acceleration. d) Calculate the time the block takes to reach the end of the incline.Two Blocks having mass m=11.0 kg are connected by a light string passing through two pulleys as shown. The block on the left is resting on an inclined plane of angle 0=45.0° . The pulleys and the planes on which the blocks are resting are frictionless. The blocks are released from rest and allowed to move freely. a. Draw the free body diamgrams for each block and then write down newton's second law of motion for each one separately. b. Find the acceleration of the blocks and the tension in the string.
- Look at the pictureCould someone explain for me? Thank you in advance!A stockroom worker pushes a box with mass 12.9 kg on a horizontal surface with a constant speed of 2.50 m/s. The coefficients of kinetic and static friction between the box and the surface are 0.340 and 0.470, respectively. For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Delivering the goods. F₂ = 43.0 N Submit ✓ Correct Part B Previous Answers a = If the worker stops pushing, what will be the acceleration of the box? Express your answer in meters per second squared. Assume that + direction coincides with the direction of velocity. ► View Available Hint(s) Submit VI ΑΣΦ Previous Answers wwww ? X Incorrect; Try Again; 3 attempts remaining Review | Constants m/s²