you want to see if you can lift your three friends when each side of the seesaw is equal in length (3.5m). What is the MA? What effort force is needed to lift them?​

Which of the following are guidelines to follow for obtaining accurate observations

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?