You have a friend who is entering a skateboarding competition in los angeles. she wants to take a running start and then jump onto her 5 kg stationary skateboard. she will then roll along a 2 meter section of level track and go up a curved concrete ramp. she wants to reach a maximum height of at least 3 meters above where she started. she can run with a maximum speed of 8 m/s and has a mass of 50 kg. will this trick work?

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Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.