An ideal cord (no mass and no elongation under load) is wrapped around a disc of radius r (r=50 cm, J=0,4 kgm2). The free end of the cord is connected to the mass of m=3kg. The disc is pin jointed and no friction is arisen at the pin. The cord does not slide on the disc and the system is at rest initially. When the system is released the mass, due to the gravity, starts acceleration a. to move with Find the acceleration of the mass, and the change in the linear momentum of the mass as well as in the angular momentum of the disc during 3 seconds. g=9.81 m/s?

A carnival ride has people stand inside a vertical cylinder with their backs to the wall. The cylinder starts spinning and the riders find that they are “stuck” to the wall and don’t slide down, even if the floor is removed.  The ride has a radius of r. The person has a mass of m and is moving with a constant speed of v. The coefficient of static friction between the person and the wall is μs , and kinetic friction μk. The person is only touching the wall, not touching the floor.   What is the magnitude of the acceleration of the person? In what direction does it point?   The speed is constant. Why is the acceleration not zero? Briefly explain. No equations!

Please could I have the solutions for this question in a step-by-step form. Thank you very much.

The smooth surface of the vertical cam is defined in part by the curver - (0.2 cos 0+ 0.3) m. (Figure 1) Figure If the forked rod is rotating with a constant angular velocity of 4 rad/s, determine the force the cam and the rod exert on the 1.1-kg roller when 0-30°. The attached spring has a stiffnesss k- 30 N/m and an unstretched length of 0.1 m. Express your answers in newtons using three significant figures separated by a comma. Neam, Frod = Submit AΣo↓ vec Previous Answers Request Answer * Incorrect; Try Again; 3 attempts remaining < Return to Assignment Provide Feedback Kwi| ? N

A board sits in equilibrium. On the left end, there is a wire that supports the board from the ceiling, and to the right, there is a sawhorse that supports the board from the ground. The sawhorse is a distance d= 1/5l from the right edge of the board. There is a block with mass ms= 4.5kg that is a distance 3/4l from the right edge of the board. Finally the board has a mass mb= 11kg. c) Write down Newton's 2nd law. Put the equation in terms of mb, ms, g, T, and Fn. Where T is the tension in the wire, and Fn is the normal force of the sawhorse on the board. d) Write down Newton's 2nd Law for rotations. Put the equation in terms of l, mb, ms, g, T, and Fn.

Question 2 A rope of length L = 2.8 m and mass m = 2 kg is initially at rest and can slide on an inclined surface with incline = 20° as shown in the figure. Assume that the part of the rope that is not on the inclined surface hangs down vertically at all times and that the static friction coefficient between the rope and the surface is μ = 0.49. 0 b a) Calculate the maximum value of b for which the rope will not start sliding down the slope.

Answer the problem in the picture

Problem 2 Given: 0.75 m t0.4 m Mass of car: 1400 kg D 1.25 m H m- 2 m- -- 1.5 m→- 2 m- Mass of trailer: 800 kg Braking force at C (µc= 0.40) is applied and causes skid. 0.75 m 0.4 m FREE TO ROLL -FREE TO ROLL |D H m-- 2 m- +1.5 m-- 2 m- 1.25 m Determine the reactions at B, C, and D. Note: Pin supports can resist both vertical and horizontal forces.

Find the minimum force P for impending motion of the refrigerator shown, and determine whether it will slip or tip, given:W = 180 lbs, L1 = 4.5 ft, L2 = 3.7 ft, L3 = 2.3 ft, L4 = 1.5 ft, μS = 0.5

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