This climber (mass=52kg) is maintaining this posture while grabbing onto a rock at P3 and reaching for the wall with her right hand (no contact of wall and right hand). The rock at P1 applies a force of 187.4 N at an angle of 140.2 deg from the positive x axis on her right foot at P1. The rock at P2 and the climber's pants have a coefficient of static friction of 0.78 and the y component of the force of the rock on her pants is 144.0 N upward. The rocks at P1 and P2 are vertical surfaces. The friction forces acting at P1 and P2 are as large as friction will allow. Analyze the forces in the frontal plane as shown and show mechanical rationale for each question. a) What is the net interaction of the her left hand on the rock at P3? b) Which surface (P1 or P2) has a lower coefficient of static friction? If she took off her shoes and tried to hold this position with her socks (coefficient of static friction of her socks and rock is 0.78), will she be able to maintain static equilibrium? ) Which muscles/ligaments need to be activated or be under tension at her right knee? knee flexors/ knee extenors/ LCL/ MCL? The picture shows the back portion of her leg. 0.280-b사 -0.600- 0.280 CM 0.240 0.064 P2 P1 -0.388D1

A 250 lb refrigerator is being pushed. You do not know what force P should be applied. The coefficient of static friction between the refrigerator and floor is lg = 0.4. The center of gravity of the refrigerator is at point G. - d2 -- d2 F1 d3 d1 d4 Values for the figure are given in the following table. Note the figure may not be to scale. Variable Value di 4.5 ft d2 1.5 ft d3 2.5 d4 3.5 a. Determine the force P that is needed to overcome friction. b. Determine the location of the normal force r measured from the center of the refrigerator if the force P from part a is applied. c. Determine the minimum force P that is required to tip the refrigerator. d. Will the refrigerator slip or tip first? Round your final answers to 3 significant digits/figures. P= lb ft Pip = lb Will the refrigerator slip or tip first? tip O slip

All of the questions below

The 60 kg two-wheeled cart is described in the figure and parameter table below, with G indicating the location of the center of gravity. It is to be pulled so that it goes up the small step. Find the normal force on each wheel, and the magnitude and direction of the force applied at handle. HINT: remember that there are two wheels sharing the load @080 BY NO SA 2021 Cathy Zupke 4₁1 G L₁ L₂ parameter value 0.6 0.5 0.8 0.7 0.2 A L3 LA d L3 units m m m m m B L₂ F For the answers, take to the right and up to be the positive directions. The normal force at each wheel at A in the x direction is Ax= 150 XN The magnitude of the force at B is F Measured from the positive horizontal axis, the angle of F= 45 X° = 212 XN