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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
Don't you understand ? You need the result of the first part of the problem
in order to answer THIS part.
- The object is slowed,
- The object is stopped,
- The object's motion is reversed.
if this equation is x = Av, the A is time.
What is the relationship between forces and energy?
Forces can change the energy of an object by doing work on it or transferring energy to it. Energy can also be stored in an object as potential energy, which can be converted into kinetic energy when forces act on the object. In general, forces are related to changes in energy through the work-energy principle.
Ignore the kinetic friction coefficient, that is only in the problem to trick you. If the force pulling the sled is parallel to the ground, then the problem should be pretty easy. Acceleration due to gravity = 9.8 m/s^2
the unit of torque is NM.
Torque has dimensions of force times distance. Official SI literature suggests using the unit newton metre (N·m) or the unit joule per radian.[8] The unit newton metre is properly denoted N·m or N m.
Torque, moment or moment of force is the tendency of a force to rotate an object about an axis.
The magnitude of torque depends on three quantities: the force applied, the length of the lever arm[2] connecting the axis to the point of force application, and the angle between the force vector and the lever arm. In symbols:
whereτ is the torque vector and τ is the magnitude of the torque,r is the displacement vector (a vector from the point from which torque is measured to the point where force is applied), and r is the length (or magnitude) of the lever arm vector,F is the force vector, and F is the magnitude of the force,× denotes the cross product,θ is the angle between the force vector and the lever arm vector.
What KVA generator is required to run two AC of 1.5 ton?
How much KVA generator is required to run two AC of 1.5 tone
State Perpendicular axis theorem?
if xx and yy be the two axes and the moment of inertia of them be Ixx and Iyy then the moment of inertia about the zz axes will be Izz
What is it called when light passes through a substance is it transmitted or absorbed?
It is transmitted.
What are the thrcniques adopted by human beings to reduce energy losses due to friction?
One of the examples is vehicles are designed in "AERO DYNAMIC" model.
What energy does a train have climbing up a hill at a steady speed?
The train is expending mechanical energy to be lifted higher in the earth's gravity well. As it is lifted higher, it is collecting and storing potential energy because of the fact that it is in that gravity well.
What are examples of oscillatory motion?
Oscillatory motion can be described as any object moving/swinging back and forth, moving up and down, pulsating, spinning, or vibrating. A few examples of each are:
swinging; pendulums, swings, metronomes
moving up and down/side to side; fixed springs out of equilibrium, seesaws, wave patterns (ocean waves, sound waves, radio waves, light waves etc.)
pulsating; light bulbs, speakers
spinning; spinning top, the Chandler wobble (the effect of a non spherical object spinning, AKA a free nutation)
vibrating; string instruments, protons/neutrons in a nucleus, the human voice/vocal cords, a tuning fork, objects subjected to their resonating frequencies.
How would zero gravity affect newton's laws of motion?
They would not affect Newton's laws in the slightest.
It is 20 N.
What is the input force and the output force of a can opener?
A "regular" can opener is a machine that combines a wedge (to cut through the top of the can) with a wheel and axle (which moves the can opener's cuttng wheel -- the wedge -- around the top of the can). The input force is provided by the operator, either by hand or via electric power. The output force is the separation of the metal of the top and the movement of the opener around the can. We also find that the can and the openers parts get a bit warmer with its use, and there are losses in the system due to friction.
Theorem that states that an impulse produces a change in momentum?
It is called the momentum-impulse theorem and states that an impulse will change the momentum of an object. For example, if you drop an object when it hits the ground an impulse occurs. The momentum of the object also changes.
Jnet = deltap,
where deltap is the change in momentum.
What force makes us move forward when a car suddenly stops?
This is not a force, but your conservation of momentum. For there to be a force, you must have some acceleration, but what you feel is actually your body attempting to continue moving forward until the force of friction and force normal of your seat belt decelerate you.
Variation in the value of gravity?
Mass and distance alter gravity Mass is directly proportional to the gravitational force, but distance is inversely proportional. (In other words, greater mass means greater force, and greater distance means less force)
Determining coefficient of static friction using an inclined surface?
co -efficient of friction is equal to tan inverse of the inclination
