Answer:
The mechanical advantage of a 3rd class lever is always less than 1. For this class of levers, the input effort is higher than the output load, which is different from second-class levers and some first-class levers. However, the distance moved by the load is greater than the distance moved by the effort.
Explanation:
Answer: when females involve themselves in to physical education ,it will be difficult for them to give birth.
Explanation: Research has shown that, females that do more exercises are able to give birth without any difficulties.
