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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
Which class of lever is the best?
The classes of lever have nothing to do with how "good" they are. Which class of lever will work the best in any given situation depends on the situation.
this is the system of playing cricket and the system of gusthy
What is the velocity on an object with no net force?
When there is no resultant force there is no acceleration therefore the velocity will stay the same.
What is the difference in compression and rarefaction between a loud sound and a soft sound?
The difference in compression and rarefaction between a loud and a soft sound is the change in density of the medium conducting the sound. We know that sound is a mechanical wave, and it requires a medium through which to travel. (Sound transfers its energy into the medium to propagate.) Let's do an experiment taking air for the medium and look closely at what is happening.
We've got an amp connected to a speaker and a constant signal being amplified. The signal has a characteristic frequency and amplitude. Air is being compressed and rarefied as the speaker cone moves out and in (respectively) to create the sound. Now we'll turn up the volume and look again.
What we saw before will change in that the speaker cone will move farther out and in than it did before. It will still move at the same rate as it did because the frequency of our signal did not change. But because it is moving further out, it will compress air "more" than it did before the volume was increased. There will also be a correspondingly greater "decompression" of air when the speaker cone moves back. Air density will be greater in the compression phase at the new amplitude than it was. And air density will be less in the rarefaction phase at the new amplitude than it was.
The difference in compression and rarefaction between loud and soft sound is the relative density of the medium during these portions of the wave. Certainly if the sound is moving through a liquid or solid, there will be a much lower change of density of the medium as liquids and solids are largely incompressible by sound. But the idea is the same as it is in the model of sound moving through air.
What are the branches of physics describe each?
Answer is:
physical geography
human geography
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What can cause a Ford Focus 2003 zx3 lose power?
Clogged fuel filter, dirty injectors, bad spark plugs (should be changed every 100K miles).
What is the effect of balance forces on an object that is not moving?
A group of balanced forces adds vectorially to zero, so has
no effect on any object, whether it's moving or not moving.
What is applying a force through a distance known as?
We do work when we apply a force through a distance.
Acceleration can be defined as the rate at wich velocity?
Acceleration is observed when velocity changes with respect to time. For instance, at t0 an object may be moving with a velocity of 2. At t1, it could be moving with velocity of 4, which means that it has doubled its velocity; thus accelerating.
This can also be observed in reverse, where at t0 the velocity is 4 and at t1 the velocity is 2. The object then has decelerated, or has slowed down with respect to change in time.
What are bigger units of works?
Well since Joule is the standard unit a Megajoule (1 million joules) or a kilojoule (1000 joules) can be used. Also a kilowatt-hour (3.6 million joules) is used by electric companies to keep track of the energy people use.
If mass and velocity of glider increased what will happen to the kinetics energy?
Since Ek = 1/2 mv2 , That means that mass, velocity and the kinetic energy is directly proportional. So, if the mass and the velocity of the glider is increased so will be its Kinetic Energy of motion.
There is no correlation. One measures power, the other speed.
What is the definition of unbalanced foces?
-- A group of two or more forces is unbalanced when the vector sum
of its individual component forces is not zero.
-- A group of two or more forces is balanced when the vector sum
of its individual component forces is zero.
Notice that it's not the forces that are balanced or unbalanced.
It's the whole group of them that's balanced or unbalanced.
When thrust and drag are equal why does the object still move?
When the forces on an object add up to zero, the object's acceleration is zero. That
means the speed or direction of its motion doesn't change. It does not mean that
the object isn't moving. A moving object would just keep moving at a constant
speed in a straight line.
When an object is moving it stays moving unless acted upon by?
When an object is moving it stays moving unless acted upon by opposing force(s). i.e. gravity, friction, etc. See Newton's 1st law of motion: related links.
You may have to determine the coeffient by experiment. It is impossible to include every possible combination of materials.
This can build a "sled" and place one material flat along the bottom. A thirty pound sled is common. Pull this weight across a flat surface covered by the other material. Measure the amount of force required to initiate movement using a spring scale (like a fish scale). This force in pounds divided by the weight of the sled in pounds will equal the coefficient of static friction. To determine the dynamic coefficient of friction, measure the pounds required to keep the sled in motion. This will be somewhat less than the force required to start the sled in motion.
The coefficient for vinyl and nylon should be quite low.
If Conjugate momentum is conserved for cyclic coordinate?
Conservation of linear Momentum is independent of the coordinate system. It does not matter what coordinates are used. In a closed system, i.e. no external forces, momentum is conserved
What is predicted by dividing the net force by the mass of an object?
An object moving with a force(magnitude) per unit mass to a particular direction is said to be accelerating.Therefore,acceleration is predicted by dividing the net force by the mass of an object.Mathematically,F=MA;Acceleration(A)=Force(F)/Mass of the object.i.e F=M/A.
The acceleration will be in the direction of the net force.
Does air resistance act on the surface of a snowflake when it is in motion?
Anything moving in air is acted on the by the air, including the snowflake. Air, a fluid, will interact in a dynamic way with anything around which it is moving. Air resistance is a factor with a snowflake, a rain drop or a hail stone. Aerodynamic principles apply. We investigate stuff like this, and fluid dynamics is the field of study.
