# Tag Info

### Velocity of blocks under different situations

Ignoring terminal velocity and air resistance, if you tie one block with another, then the force of gravity will work through the center of mass,and that will define the final speed. Ground facing ...
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### Velocity of blocks under different situations

Without considering drag, we can assume $E = mgh = mv^2/2$, and $v = \sqrt{2gh}$. Case 1 - The higher block went through a longer distance, thus it has the higher terminal velocity. Case 2 - The ...
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### Fatigue Strength of materials

The fatigue limit or endurance limit is the stress level below which an infinite number of loading cycles can be applied to a material without causing fatigue failure. Ref The yield is the point on a ...
• 7,293

### Calculating torque in planetary gearbox

Generally, torque is not applied to the individual planetary gears, just to the carrier that holds them. Unless you have an individual motor attached to each planet gear (physically possible, but ...
• 256

### Work done by a force in a deformable body

Work is a strange but useful mathematical concept. It is very handy because it is conservative in inertial frames. It also has an intuitive meaning most of the time, but not always. This is what gets ...
• 3,381
1 vote

### Work done by a force in a deformable body

Individual work done on the body by a single force equals $F*s$ as shown on the sketch to the right. The work done by multiple forces equals the vector sum of the forces ($R$) and the absolute/net ...
• 7,293
1 vote

### Work done by a force in a deformable body

The work of a force is by definition vector multiplication of the force by displacement. $$W =F*x$$ Let's use two examples to clarify. In a pendulum, the work done on the part of the descending of ...
• 20.9k

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