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A delivery person carries a stack of three boxes labeled 1, 2, and 3. Box 3 is on the bottom of the stack, and box 1 is on the top. The masses of boxes 1, 2, and 3 are m₁ = 3.5 kg, m₂ = 4.5 kg, and m3 = 7.0 kg, respectively. The delivery person places the stack of boxes on an elevator floor, which then accelerates downward with a magnitude of a = 0.80 m/s². Assume that the positive direction is up. Calculate the contact force F₁-2 that box 1 exerts on box 2 during the acceleration. 10.61 F₁-2 = N Calculate the contact force F3-2 that box 3 exerts on box 2 during the acceleration. F3+2 = N Incorrect Incorrect
Three rugby players are pulling horizontally on ropes attached to a box, which remains stationary. Player 1 exerts a force F₁ equal to 100 N at an angle 0₁ equal to -60.0° with respect to the +x-direction, as shown in the figure. Player 2 exerts a force F₂ equal to 200 N at an angle 02 equal to 31.0° with respect to the +x-direction. The view in the figure is from above. Ignore friction and note that gravity can be ignored in this problem. Determine the force F3 exerted by player 3. State your answer by giving the x- and y-components, F3x and F3y, respectively. N F3x = Player 3's rope breaks, and player 2 adjusts by pulling with a force of magnitude F equal to 150 N at the same angle as before. Defining angles above the x-axis as positive and those below as negative, at what angle 0 is the acceleration of the box relative to the +x-direction? The magnitude of the acceleration is measured to be 10.0 m/s². What is the mass m of the box? F3y = 0 = m = TEL 0₂ N kg
T2 A 135 N sign is supported by two ropes. One rope pulls up and to the right 0, = 35.5° above the horizontal with a tension Tì, and the other rope pulls up and to the left 02 = 51.5° above the horizontal with a tension T2, as shown in the figure. Find the tensions T, and T2. T Ol a 110.05743 Ti = N EXIT Incorrect T2 = N Incorrect
Two forces act on an object of mass M = 4.00 kg as shown in the figure. Because of these forces, the object experiences an acceleration of a = 6.00 m/s² in the positive x-direction. If 0₁ = 30.0°, calculate the magnitude of F2 given that F₁ = 20.0 N. N F₂ = || M y ? 0₁ F₁ X