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its a ball
The same.
it's a fulcrum
1.2 x 10^4 J That is in Significant Figures
no
It can do alot of work. Eg. When you use a cannon launcher or slingshots. We pull it using the rubber and the stored energy pushes the cannon ball or rock and attacks.
its a ball
its a ball
i think it is a simple machine
It is a machine that automatically shoots tennis balls at you to practice hitting.
The same.
lever
it's a fulcrum
It is a wheel and axle
A cannon ball.
a cannon ball
the size of the cannon ball depends on the size of the cannon. civil war cannons had cannon balls about the size of a child's head, aprox 30cm across