Slip. Consider the figure below. If µ, = 1/(2 + V3) between the surfaces, what is the smallest possible 0 such that the block does NOT slip while resting on the circular surface?
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- Slip. Consider the figure below. If us = 1/(2+ V3) between the surfaces, what is the smallest possible 0 such that the block does NOT slip while resting on the circular surface? O 15° O 30° O 75° O 60°Two cones have their heights in the ratio 1:3 and radii in the ratio 3:1. What is the ratio of their volumes?The 38-kg homogeneous smooth sphere rests on the 40° incline A and bears against the smooth vertical wall B. Calculate the contact force at A and B. Assume = 40°. Answers: FA = FB: = Ꮎ i 498 307 B N N
- For the section shown, find the second moment of area about axis XX 25.0 mm 3.0 mm 18.0mm 5.0 mmWhen using a ladder, it is important to place it against a wall at a safe angle. A ladder could tip over backwards if the angle is too large or the ladder could slide down the wall if the angle is too small. For a ladder to be placed at a safe angle, the ratio of the working length (how far you climb the ladder) to how far the ladder is from the wall should be 4 : 1. What angle should we place place our ladders at so that they are safe when we use them?A rectangular cantilever beam AB has point A positioned at the origin of the coordinate system and point B at coordinates (1.2, -0.3, 2.4) m. The vector r₁ = (1î + 12ĵ + 1ê) m is oriented parallel to the thin cross-sectional dimension, and is perpendicular to to FAB (directed along the beam axis AB). Z P a Verify that r₁ is perpendicular to TAB 2 TAB X b Determine the unit vector 2 that is perpendicular to both r₁ and rab and has the orientation shown in the figure. c Assuming that the force P applied to point B of the beam has 1000 N magnitude and direction angles x 144°, 0y = 72°, and 0₂ = 60°; Determine the components of the 1000 N force, namely PAB, P₁, and P2, in the directions AB, 7₁, and 2, respectively. = =
- Y Figure Fw 40° CG Ymg FT 1 of 1 Calculate the tension Fr in the wire that supports the 42 kg beam shown in the figure(Figure 1). Express your answer using two significant figures. Fr= 320 N Submit ✓ Correct Part B Calculate the magnitude of the force Fw exerted by the wall on the beam. Express your answer using two significant figures. Fw: || Previous Answers Submit Part C VO ΑΣΦ A Request Answer Ċ ? NThe cable AB carries a tension of 520 N. Determine the moment about O (positive if counterclockwise, negatíve if clockwise) of this tension as applied to point A of the slender bar. 620 mm 470 mm 24 Answer: Mo = i N-m45 kg.…* X = ? +0.4 m -0.5 m→ 30 kg 40 kg The 3m long uniform plank is supported by a fulcrum at the midpoint. Where should a 45kg student must be from the midpoint to be able to balance the plank?
- The spool shown in (Figure 1) has a mass of 130 kg and a radius of gyration kg = 0.3 m. Figure 250 mm G A -400 mm P Part A If the coefficients of static and kinetic friction at A are μ = 0.2 and = 0.15, respectively, and P = 700 N, determine the angular acceleration of the spool. Express your answer in radians per second squared to three significant figures. VO ΑΣΦ ↓↑ vec a= 13.2 Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Provide Feedback ***** www. ? rad/s² Next >The 31-N force P is applied perpendicular to the portion BC of the bent bar. Determine the moment of P about point B and about point A. Moments are positive if counterclockwise, negative if clockwise. C Answers: MB = MA= i i P = 31 N 1.7 m B 49° 1.7 m N.m N-m2. You are to compare the gyradius of four (4) solid, homogeneous iron cylinders about their longitudinal axis. Which of the following is FALSE? 2a 2a L 2L 2L Cylinder E Cylinder F Cylinder G Cylinder H Hint: Divide the formula for the mass moment of inertia of the cylinder by mass m then get the square root. You will find which dimension(s) matters for gyradius. k_E = k_H k_GSEE MORE QUESTIONS