Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
The Impulse-Momentum Theorem help1?
A 44 kg skater is standing still in front of a wall. By pushing against the wall she propels herself backward with a velocity of -1.9 m/s. Her hands are in contact with the wall for 0.80 s. Ignore friction and wind resistance. Find the magnitude and direction of the average force she exerts on the wall (which has the same magnitude, but opposite direction, as the force that the wall applies to her).
direction answer possibilities:
1)opposite velocity of skater
2)same direction of velocity of skater
3)upward
4)not enough information to tell
1 Answer
- Roy ELv 41 decade agoFavorite Answer
The wall pushes the skater the same direction that she travels. So the force that she exerts is opposite of her velocity.
Her momentum is equal to the product of her mass and speed. You can calculate the momentum here because the quantities are known.
Her momentum is also equal to her average force times the duration of the force which is .8 seconds. Use F as an unknown and solve for F.
