What is a catapult? https://www.youtube.com/watch?v=XeE_3YGV8zM
The catapult was a one-armed stone thrower.
Newton's second law relates an object's mass, acceleration, and force with which it
is moving. This law of motion states that force equals mass times acceleration. So
by multiplying the mass of an object and it's acceleration, you can find the force
that it is exerting. You can calculate what force the marshmellow exerted on the
grass when it tumbled into it. Just multiply the mass of the marshmellow, 0.5
grams, by its acceleration, 5 m/s².
Вокабуляр: Gravity, force, push, pull, weigh, directions (up, down, left, right), etc
Video kak delat’ https://www.youtube.com/watch?v=a1BlJDF-HLY&app=desktop