Secret agent Samantha Bond, 51.50 kg, has just ignited her jet powered skis at t

Question

Secret agent Samantha Bond, 51.50 kg, has just ignited her jet powered skis at the foot of a 10.0 degree slope that rises in height by 50.0 m. The skis have a thrust of 229.0 N. When she gets to the top of the slope, she keeps the skis at 10.0 degrees as she flies through the air. At what horizontal distance from the top of the slope, from where she took off, will she land? This will be 50.0 m below where she took off. The thrust of the skis is parallel to the skis. There is no friction on the slope, and air resistance can be ignored.

Explanation / Answer

2. Relevant equations hc/lambda - pc = 2m(e)c^2 at threshold, hf(min) = 2m(e) c^2 3. The attempt at a solution I know this can't work b/c you can't find a Lorentz frame in which the e+ and e- have equal and opposite momenta, b/c then the photon would be at rest which would disobey the law of special relativity. At threshold, all the energy of the photon becomes the mass of the electron and positron so the electron and positron have KE=0. h/lambda = p- + p+ 2m(e) c = m(e) u- + m(e) u+ 2c= u- + u+

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