Physics, 09.04.2020 02:03 mariaf0203
In a downhill ski race surprisingly little advantage is gained by getting a running start. This is because the initial kinetic energy is small compared with the gain in gravitational potential energy even on small hills. To demonstrate this, find the final speed and the time taken for a skier who skies 65.0 m along a 30° slope neglecting friction for the following two cases. (Note that this time difference can be very significant in competitive events so it is still worthwhile to get a running start.)(a) starting from restfinal speedm/stime takens (b) starting with an initial speed of 3.00 m/s final speedm/stime taken s
Answers: 1
Physics, 22.06.2019 19:00
Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe
Answers: 1
Physics, 23.06.2019 08:30
List and describe three ways that humans can change ecosystems and three ways that humans can protect ecosystems.
Answers: 2
In a downhill ski race surprisingly little advantage is gained by getting a running start. This is b...
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