>>132800818>How does a scale work?A scale is a measurement device used to determine the amount of force an object transfers upon contact. Is this case, the scale can be assumed to be measuring the relative net force applied by two containers - Container A (water, ping-pong ball, string, air above the container) and Container B (water, steel ball, string, air above the container)
If we assume that A and B are equal before the addition of ping-pong ball, steel ball, and string, then the net force that water and air are applying to the system are equal.
If we add the ping-pong ball to A, the net force on A will increase downwards in reference to B
>Why does the net force in A increase downwards?The net force of the ping-pong ball is downwards because its mass is being supported by the water & container
If we add the steel ball to B the net force downwards on B will increase to be greater than the net force downwards on A
>why is it greater than A?because a steel ball of identical volume to the ping-pong ball has more mass
If we add a string in A the net force downwards increases due to the mass of the string.
Connecting the string to container causes no net change in force to A
Connecting the string to the container and the ball causes the ball, water, string, and container to apply equal but opposite forces to each other, causing no net change in force to A
Adding a string to B increases the net force downwards due to the mass of the string.
Supporting the string's total mass with an object outside of B removes it's net force downwards, as B does is no longer supporting the mass of the steel ball
Connecting that string to the steel ball removes the net force of the steel ball from B, as B no longer is supporting the mass of the steel ball.
Results:
A has a net force downwards that is larger than B
The scale tips to the left
