The 120-lb door with its center of gravity at G is hung from a horizontal track at A and B. Find the largest coefficient of static friction µs at A and B for which the door will slide without lifting off the track. Also, determine the corresponding force P.

Q4) Determine whether the 90-kg man can move the uniform box has a mass 140-kg and show if the box will slip or tip. If the coefficient of static fraction between man' shoes and the floor is 0.5 and between the box and the floor is 0.2. Assume the man only exerts a horizontal force on the box.

Take moment at A to find the value of N1 If f = 0.2 at the wall, find the coefficient of friction at the floor. Find the value of N2 in terms of Y or V. If f = 0.2 at the wall, find the coefficient of friction at the floor. Find the value of f in terms of X or H.

Calculate the horizontal force P on the light 15° wedge necessary to initiate movement of the 59-kg cylinder. The coefficient of static friction for both pairs of contacting surfaces is 0.39. Also determine the friction force Fg at point B. (Caution: Check carefully your assumption of where slipping occurs.) Answers: P= i 596 FB=366 59 kg B N N

The 185-lb man with center of gravity G supports the 83-lb drum as shown. Find the greatest distance x at which the man can position himself without slipping if the coefficient of static friction between his shoes and the ground is 0.43. 15' 83 lb Answer: x = tel ft T 3.3'

QUESTION 2

The frame supports the 400 kg mass as shown. Assume a coefficient of friction of 0.25 around the pulley. Further assume the frictional forces are fully developed. Determine all external reactions and all pin reactions acting on the structure. pleas show me all your work

very urgent

The green rods apply a 2.6 kN clamping force to the red object, E. The square-threaded screw used to generate the clamping force passes through a threaded opening at B and presses against lever ACE at E. The coefficient of static friction is = 0.29. Neglect friction at A. The screw has mean radius r = 9 mm and lead L = 2 mm. B 180 mm 70 mm E (a) Determine the force in member CD in kilonewtons. (Enter the magnitude.) kN (b) Determine the magnitude of the moment in N• m that one must apply to the screw to increase the clamping force. N: m (c) Determine the magnitude of the moment in N •m that one must apply to the screw to decrease the clamping force. N: m