10. assess a child pushes down on a box
lid with a force of 25 n. at the same
time, her friend pushes down on the lid
with a force of 30 n. the spring on the
box lid pushes upward with a force of
60 n. can the children close the box?
why or why not?

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?