Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now 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
Physics help?
Two kids sit on a seesaw of length 4.2m, balanced at its center. Sarah sits at the far end
and has a mass of 50.kg. The Anna is 75kg. They seesaw for a while (having a grand time)
then decide to balance themselves. Then Sarah is given a bag of oranges weighing 3.0kg,
and the seesaw rotates out of balance. When the Anna is given a bag of apples, balance is
still not restored. She has to place the apples 0.33m behind her for them to be balanced
again. What is the weight of the bag of apples?
1 Answer
- FiremanLv 71 year ago
1st condition, let Anna is a distance of L meter from the pivot, Thus balancing the torque at pivot:
=>50 x 2.1 = 75 x L
=>L = 1.4 m
2nd condition:
Let the bag of apple is m kg in equilibrium torque at pivot=>(50 + 3) x 2.1 = 75 x 1.4 + (1.4 + 0.33) x m
=>m = 6.3/1.73 = 3.64 kg
