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Mechanics
Mechanics is the branch of physics that deals with the interactions of objects and forces in the observable world. Questions asking about projectile motion, conservation of energy, and calculus based mechanics are perfect for this topic, but questions about repairs that a mechanic would do belong in our vehicles categories.
2,416 Questions
Pressure is not a force. Pressure is force per unit area over which it is applied.
Well, look at this formula:
Work = Force*Distance
Force is in Newtons, Distance in meters and Work in Joules. So if we replace it as:
1=1d or 1=d this means distance has to be one meter for 1 newton to equal one joule, so it depends on the distance, if it is not one meter then 1 newton does not equal 1 joule.
A Pawl can be considered as a pointy thing that sits between the teeth of a gear (cog) wheel to either prevent it turning in one or both directions or to push on a tooth to make it turn. This could, for example, be used to lock an automatic transmission into Park position. With a Ratchet Pawl, the ratchet part assumes the gear wheel has teeth shaped like the teeth of a circular saw and therefore not designed to mesh with another gear. Now the Pawl is angled to fit into the angled teeth and can be used either to a) push on a tooth to turn it as before (but this time only in one direction, as it would slip out going the other way) or b) as a one-way lock so that the wheel can turn freely one way (with the Pawl slipping out one tooth at a time) but preventing it turning the other way as the pawl engages. Example a is typical of the mechanism on a revolver handgun that turns the cylinder as the hammer is cocked. Example b is typical of a safety mechanism on a cable winch so that the load cannot drop in the event of failure of the hauling force. Tommikat.
da = deca (SI factor of 10)
A m.daN is therefore 10 N.m.
So, e.g., 20 m.daN = 200 Nm .
(Don't ask me why folks don't just use Nm!?!)
9.8 meters (32.2 feet) per second2 horizontally, provided
the exercise is performed on or near the Earth.
A torque switch is a device used to control the torque applied in mechanical systems, often in electric motors or machines. It monitors the torque level and can automatically turn off or adjust power to prevent overload or damage. Commonly used in applications like conveyor systems or automated machinery, torque switches enhance safety and improve operational efficiency by ensuring that equipment operates within specified limits.
A stretching force is basically tensile strength. It is measured in pascals or equivalently newtons per square meter. For example, carbon nanotubes have a stretching force or tensile strength of 63 GPa.
Why do cold balls bounce lighter than warm balls?
In general, as gases warm up or increase in temperature, they expand.
As the ball warms up from undergoing a 'hit-up', the gas inside the ball expands, thus exerting a greater pressure outwards against the inner walls of the ball ... so that when the ball is hit by a hard object, it does not depress to the same degree as when the gas is exerting less inside pressure against its walls, as when cool.
Hence the ball recoils quicker and sooner - back to its pre-contact shape and therefore bounces or deflects off the racquet with more speed and force.
Distinguish between impulse and momentum which is force x time and which is inertia in motion?
Impulse is equal to the change in momentum:
definition of impulse is Force x time. When a force is applied to an object for a certain amount of time its momentum (mv) will increase because it is accelerating due to the force on it.
Force x time = the change in MV (change in momentum)
This is just a restatement of Newtons law F=MA it is actually derived directly from F=MA
What is a variable length system?
It means that the length of something can vary, that it is not always the same length. The expression "variable length" may be used in different context, so I don't know what the item of variable length is that you heard or read about.
It means that the length of something can vary, that it is not always the same length. The expression "variable length" may be used in different context, so I don't know what the item of variable length is that you heard or read about.
It means that the length of something can vary, that it is not always the same length. The expression "variable length" may be used in different context, so I don't know what the item of variable length is that you heard or read about.
It means that the length of something can vary, that it is not always the same length. The expression "variable length" may be used in different context, so I don't know what the item of variable length is that you heard or read about.
Is mass inversely proportional to momentum?
Mass is proportional to momentum. Momentum is the product of mass and velocity. When mass increases, momentum increases.
It consists of 2 separate parts: (a)sample cylinder,(b)piston system.
the piston which is actuated separately,fits tightly in the sample cylinder.
It is useful in sampling saturated sands and other soft and wet soils which cannot be sampled by open-drive samplers....
What kinds of motion does acceleration refer too?
Acceleration refers to a change in velocity. More precisely, the rate of change of velocity, in symbols, dv/dt.
How do you find the force of an object with just the mass and angle of object?
You cannot find the force without knowing the velocity or acceleration of the object.
The arm is perpendicular to the axis of rotation. If you look at the axis along its axis it is only a point. The torque is force times distance tot that point
Energy created by a moving particles?
There is no such thing. The fact that particles move doesn't create any energy.
Can an object have zero velocity and non zero acceleration at the same time?
Yes. Consider a skydiver in freefall. Fairly quickly the skydiver will reach terminal velocity (the speed at which their acceleration from gravity is cancelled out by the resistance of the air through which they are falling).
At terminal velocity the skydiver has non-zero velocity (about 56m/s or 200km/h) but zero acceleration (because their velocity is not increasing).
In a vacuum, where there is no air resistance, there is also no terminal velocity. Because there is no force acting against acceleration an object will continue to accelerate provided its source of acceleration continues to be applied. It is worth noting that an object cannot use this rule to exceed the speed of light because as the speed of light is approached the relative time for the object slows.
On earth, however, or indeed in any similar environment, an object can certainly have zero acceleration and non-zero velocity.
What are the advantages of a mechanical advantage that is less than 1?
You can move an object far faster than your source of power is capable of working. Such as in the final gears in your car, where the wheels are turning faster than the engine is.
Cart experiences a change in velocity(which is a vector quantity, not like speed).
Cart's velocity on circular track has to be tangent to track at each point and because of that it has to change its direction. Speed may or not remain the same, you can't tell it changes in each possible case.
Mass and weight remain the same.
Why and how did world trade centre building 7 come down in its own footprint?
It did rather exceed it's footprint, but the reasons it didn't "fall over" are as follows;
1. The structural failure was towards the top, so the bottom was fine and thus all stayed upright until the vertical shock loads of the falling floors above caused failure, which was progressive and local.
2. The walls were 'tied in' by the floors, so did not individually 'fall out', except for the small components after failure. There would certainly also have been a central 'core', with stairs, lift shafts etc, which would have failed last, so each floor would be likely to have 'slid' down around the core on impact of the floors above, before the core itself failed.
2.
How are frequency and amplitude related?
They're not. The same amplitude can have high or low frequency,
and the same frequency can have large or small amplitude.
