Physics, 05.10.2019 15:00 cxttiemsp021
Which statement best describes the energy changes that occur while a child is riding on a sled down a steep, snow-covered hill?
a)
kinetic energy decreases and potential energy increases.
b)
kinetic energy increases and potential energy decreases.
c)
both potential and kinetic energy decrease.
d)
both potential and kinetic energy increase
Answers: 1
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Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?
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Answers: 1
Which statement best describes the energy changes that occur while a child is riding on a sled down...
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