The arm is rotating at a rate of 0 = 4 rad/s when 0 = 3 rad/s² and 0 = 180°. It is confined to move along the slotted path. Motion occurs in the horizontal plane. (Figure 1)
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- The normal pressure acting on the disk of the sander is given by p=(4/3)+(r2/6), where p is the pressure in pounds per square inch (psi) and r represents the radial distance in inches. Determine the torque C required to operate the sander at constant speed if the kinetic coefficient of friction for the surface being sanded is 0.86.Draw the FBD for the bar described in Prob. 5.1 if the bar is homogeneous of mass 50 kg. Count the unknowns.The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016, determine the force F required to advance the bar at a constant speed.
- The homogeneous bar AB weighs 25 lb. Determine the magnitudes of the forces acting on the bar at A and B. Neglect friction.A block of mass m = 3.1 kg is placed on a rough incline surface making an angle 0 = 27.7. with horizontal. A force F parallel to the ground is applied to the block. Due to the applied force the block moved x = 0.53 meter along the inclined surface with constant speed. If the inclined surface has kinetic friction coefficient uk = 0.23 what is the work done by the friction force? Provide your answer with 2 decimal places. Take g = 9.81 m/s2 HKA skier starts from rest on the 39° slope at time t = 0 and is clocked at t = 2.60 s as he passes a speed checkpoint 20 m down the slope. Determine the coefficient of kinetic friction between the snow and the skis. Neglect wind resistance. 39⁰
- The automobile in (Figure 1) has a mass of 1.2 Mg and center of mass at G. Both the front and rear brakes are locked. Take = 0.3. Figure ▼ Part A F = Submit 0 F 30° 0.3 m Value μÀ C Ⓡ Request Answer 0.75 m GO Determine the towing force Frequired to move the car. Express your answer to three significant figures and include the appropriate units. d 1 m 1.50 m- Co Units B ? 0,6 m < 1 of 1Situation 3 Blooke A ana B weign 30 lo and 50 lo, respectively. B µ = 0.5 20 HBA = 0.6 C HẠC = 0,4 D If the weight of blook Dia to be grestest witnout osueing motion, ueing the coeffioiente of atetio friotion inciceted, whet is the friotional foroe (Ib) between blook A and the floor C? Seleot the corect reoponoe 1275 O 21.25 5.81 40.33 15.72 0.60 43.67 36.04 47.17 26.20 S2 17.25 O OA skier starts from rest on the 39° slope at time t = 0 and is clocked at t = 2.60 s as he passes a speed checkpoint 20 m down the slope. Determine the coefficient of kinetic friction between the snow and the skis. Neglect wind resistance. 39⁰
- 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- H1. A wooden block of mass m is pushed over a floor in a straight line in the x direction with a constant velocity vo > 0. At time t = 0, when the block is at position x = 0, it is no longer pushed and the block experiences only a constant sliding friction force F in the negative x-direction until it comes to rest. (i) Write down the equation of motion of the block for t > 0. Calculate the time, t, at which the block comes to a stop and also find the distance, d, travelled by the block from the time when the pushing is stopped to the time when it comes to rest. (ii) Calculate the work done by the friction force from x = 0 to x = d, and then show that it is equal to the change in the kinetic energy of the block.What is the largest moment that can be applied without causing motion? The disk is 50 lb and the bar is 25 lb. The static friction is 0.6. Express your answer in in-lb (inch-pounds) with three significant figures. 5 in (5) force TOV M U from moving by exerting a horize 20 in 30° -ooges di 081 box of 08 styis m