Doug pushes a 4.70 kg crate up a 2.20-m-high 20 degree frictionless slope by pushing it with a constant horizontal force of 24.0 NWhat is the speed of the crate as it reaches the top of the slope? Solve this problem using work and energy?
Work = Energy
F * d = kinetic energy + gravitational potential energy
(24 cos 20 N)(2.2/sin 20) = 1/2 (4.7 kg)v^2 + (4.7 kg)(9.8 m/s^2)(2.2 m)
43.7 = 2.35v^2
v = 4.3 m/s
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