In a downhill ski race, your final velocity is not affected very much by getting a running start, because the initial kinetic energy is small compared with the gain in gravitational potential energy on even small hills. However, you will finish the race much faster (which is more important!). To demonstrate this, find the final speed and the time taken for a skier who skies 72.5 m along a slope that is 23°, measured from horizontal, in the following situations (you may neglect friction).
a) Find the final speed (in m/s) of the skier starting from rest.
b) How long (in s) does it take for the skier to reach the bottom of this hill starting from rest?
c) Find the final speed (in m/s) of the skier starting with a speed of 2.50 m/s.
d)How long (in s) does it take for the skier to reach the bottom of this hill with a starting speed of 2.50 m/s?
Answers: 3
Other questions on the subject: Physics
Physics, 21.06.2019 18:00, justhereforanswers13
According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?
Answers: 1
Physics, 22.06.2019 04:30, tayveon122
Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?
Answers: 2
You know the right answer?
In a downhill ski race, your final velocity is not affected very much by getting a running start, be...
Questions in other subjects:
Computers and Technology, 20.10.2020 23:01
History, 20.10.2020 23:01
History, 20.10.2020 23:01
Mathematics, 20.10.2020 23:01
Arts, 20.10.2020 23:01
Mathematics, 20.10.2020 23:01
Mathematics, 20.10.2020 23:01
