7.21 | In a downhill ski race, surprisingly, little advantage is gained by getting a running start. скачать в хорошем качестве

7.21 | In a downhill ski race, surprisingly, little advantage is gained by getting a running start.

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 on even small hills.) To demonstrate this, find the final speed and the time taken for a skier who skies 70.0 m along a 30º slope neglecting friction: (a) Starting from rest. (b) Starting with an initial speed of 2.50 m/s. (c) Does the answer surprise you? Discuss why it is still advantageous to get a running start in very competitive events. OpenStax™ is a registered trademark, which was not involved in the production of, and does not endorse, this product. If you don't have the OpenStax™ "College Physics" textbook, here is a link in which you can download it for FREE! https://d3bxy9euw4e147.cloudfront.net... SUBSCRIBE if you'd like to see more solutions for your textbook!    / @glasertutoring   Want us as your private tutor? Get started with your FREE initial assessment! https://glasertutoring.com/contact/ #PhysicsEnergy #GravitationalPotentialEnergy #OpenStaxPhysics