Seesaw Problem
Seesaw Problem - Related Videos
08:19
Tracking Morphogenetic Tissue Deformations in the Early Chick Embryo
0 Views •
Cited by 10 •
2011
This article describes surface labeling and ex ovo tissue culture in the early chick embryo. Techniques amenable to time-lapse bright field, fluorescence, and optical coherence tomography imaging are presented. Tracking surface labels with high spatiotemporal resolution enables kinematic quantities such as morphogenetic strains (deformations) to be calculated in both two and three dimensions.
12:20
Preparation of Segmented Microtubules to Study Motions Driven by the Disassembling Microtubule Ends
0 Views •
Cited by 19 •
2014
Microtubules are inherently unstable polymers, and their switching between growth and shortening is stochastic and difficult to control. Here we describe protocols using segmented microtubules with photoablatable stabilizing caps. Depolymerization of segmented microtubules can be triggered with high temporal and spatial resolution, thereby assisting analysis of motions with the disassembling microtubule ends.
12:11
Using Optical Tweezers for the Generation of Hybrid Spheroids
0 Views •
2025
In this paper, we propose a protocol for hybrid spheroid manufacturing using optical tweezers. This method allows precise control of the early stages of the spheroid formation process, which is unattainable by other methods.
08:26
Analyzing the Interaction of Fluorescent-Labeled Proteins with Artificial Phospholipid Microvesicles using Quantitative Flow Cytometry
0 Views •
Cited by 2 •
2022
Here, we describe a set of methods for characterizing the interaction of proteins with membranes of cells or microvesicles.
FAQs
Torque is found by multiplying the force by its perpendicular distance from the pivot. In a seesaw problem, that force commonly comes from gravitational force associated with a mass. The distance acts as the lever arm, so changing either the applied force or its position changes the turning effect and can alter whether the beam rotates or remains balanced.
The pivot determines the lever-arm length for every force acting on the beam. A force applied farther from the fulcrum produces a greater torque than the same force applied closer to it. Consequently, a mass can balance another mass without being equal to it, provided the clockwise and counterclockwise turning effects match.
Mechanical advantage appears when lever-arm length allows a smaller force to balance a larger force. Placing the smaller force farther from the pivot increases its torque, while positioning the larger force nearer the pivot reduces its turning effect. This relationship connects mass, gravitational force, and position in a direct equilibrium calculation.
A free-body diagram organizes the forces acting on the beam and shows their locations relative to the fulcrum. It helps distinguish the forces producing clockwise torque from those producing counterclockwise torque. Using that diagram, a solver can identify the relevant masses, gravitational forces, and distances before applying the equilibrium condition.
First identify the pivot, the forces, and each force’s perpendicular distance from the pivot. Next determine which forces create clockwise and counterclockwise torques. Calculate each torque using force multiplied by lever-arm length, then set the opposing torques equal for balance. Finally, solve for the unknown mass, position, or force represented in the problem.
A seesaw calculation can determine an unknown mass, force, or location when the remaining quantities are known. It also shows whether a proposed arrangement satisfies rotational equilibrium. In physics, this makes the model useful for practicing statics and for understanding how lever-arm placement supports the operation and design of simple machines.