"While a roofer is working on a roof that slants at 38.0 ∘∘ above the horizontal, he accidentally nudges his 95.0 NN toolbox, causing it to start sliding downward, starting from rest." 1)If it starts 4.20 mm from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 22.0 NN?
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"While a roofer is working on a roof that slants at 38.0 ∘∘ above the horizontal, he accidentally nudges his 95.0 NN toolbox, causing it to start sliding downward, starting from rest."
1)If it starts 4.20 mm from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 22.0 NN?
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- Problem 1: A60.0 kg skier with an initial speed of 13 m/s coasts up a 2.50 m high rise as shown in the figure. V; = ? KE V 2.5 m 35° ©theexpertta.com A Find her final speed right at the top, in meters per second, given that the coefficient of friction between her skis and the snow is 0.39. Ve = sin) cos() tan() 8 9 HOME cotan() asin() acos() E 5 atan() acotan() sinh() 1 2 3 cosh() tanh() cotanh() END ODegrees O Radians vol BACKSPACE CLEAR I give up! Submit Hint Feedbackprevious problem: A small block slides down a frictionless track whose shape is described by y = (x^2) /d for x<0 and by y = -(x^2)/d for x>0. The value of d is 3.85 m, and x and y are measured in meters as usual. Suppose the block starts from rest on the track, at x = -1.99 m. What will the block s speed be when it reaches x = 0? New problem Same type of track as in the previous problem, this time with d = 4.73 m. The block starts at x = 0, and is given a push to the left with an initial speed of 7.57 m/s, so it starts sliding up the track to the left. At what value of x will the block reverse direction and start sliding back down? -3.72 m 3.72 m 2.92 m -2.92 mA luggage handler pulls a 15 kg suitcase up a ramp inclined at an angle 33⁰ above the horizontal by a horizontal force F of magnitude 180 N. The coefficient of kinetic friction between the ramp and the suitcase is 0.35. If the suitcase travels 1.6 m along the ramp, calculate (e) If the package started from rest, what is its speed after it has travelled 1.6 m?
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