1. A horizontal curve with a radius of 800ft connects the tangents of a two-lane highway with a design superelevation of 0.06 and a coefficient of side friction of 0.14. Lanes are to be 12-feet wide and there is no median. Please calculate: a) What is the speed limit to be posted for a vehicle traversing this curve

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move