What depends on the mass and speed of an object?
545787
E = mC^2. Therefore, Energy
1042618
weight = mass x gravity\n\nso...\n\nweight / gravity = mass\n\nthe gravitational constant on earth is approx. 9 m/s^2
916732
Is relative to the amount of energy and object contains.
515258
There are 2 kinds of mass:\n\nGRAVITATIONAL MASS:  The mass you can calculate from Newton's Law of Gravity:  F = G*m1*m2/r^2\nhere m1 and m2 are the gravitational masses of two objects.\n\nINERTIAL MASS:  The mass one can calculate from Newton's 2nd Law of mechanics:  F = m*a\nhere m is the inertial mass of an object.\n\nThey are equivalent (according to Einstein's General Relativity), but it doesn't mean that having one means having the other.  So photons (light) have gravitational mass, but not inertial mass, and so they can travel at the speed of light and at the same time be affected by gravity.\n\nHope I helped.
119697
It depends if it is acting as a Force or a Pressure (a distributed Force). If it is a force, it has units of N (Newtons, or kg m/s²) and if it is a pressure it has units of Pa (Pascals, or N/m² which is the same as kg/(m s²))
546523
Well according to Relativity Theory it is known that an Object of Mass (M) travelling at Velocity (V) would have a Change in Mass: ie\n        \n          Mass at Velocity (V)  = ( Rest Mass) / sqrt(1-(V^2/C^2) ) \n\nTherefore if we replace C^2 by V^2 then the Whole Equation becomes Infinite. in other Words You cannot Travel at the Speed of Light, because according to Physics an Object cannot have Infinite Mass.
42744
momentum is speed and mass is the substance of objects
1132748
Mass does two things:\ni) it provides resistance to accelerations\nii) it couples to gravitational fields\n - note that according to the equivalence principle of general relativity these two things could actually be the same thing.\n\nTo measure mass you measure one of those two effects.  For example you strongly accelerate a small particle (eg by strong magnetic field) and measure the velocity it reaches in a given time.  This measures its resistance to acceleration, hence its mass.  Or you measure how it moves in a known gravitational field and infer its mass from that.\n\n\nHope this helps!\nThe Chicken
106773
depends on the acceleration of the airplane or object. this found by vector addition. example: if an airplane or a rocket is falling freely (god forbid) all the objects inside will have 0 weight.
229095
mass doesn't change. Only weight changes because weight is mass times the acceleration due to gravity.\n\nWt=mg
101463
that depends on the material's specific gravity\nweight in kg = specific gravity * volume in ltrs
994962
Mass is kind of like the object's inherent inertia.  The inertia it would have regardless of its location and even if it were standing still.\n\nAn object's inertia is it's resistance to change.  Different things besides mass can affect an object's inertia.  For example, it's position can affect inertia, especially when talking about rotational motion.  An object located at a 1 meter wheel's rim has more inertia than an object located at the wheel's hub (lots more, in fact, since moment of inertia is equal to mass times the square of it's distance from the rotational axis).
866141
You have to calculate p=massXspeed before the "collision".  The quantity remains constant, so if the mass increases, the speed must decreases by the same ratio for the p to stay the same.  (First, you have to convert the 8N weight to a mass using the 9,8N/kg gravity constant)
253742
Please take the time to\nvote for the best answer\n\nThank You!!\n\nRecall that an object of a certain mass moving with particular speed will have an associated kinetic energy  mass x speed2. An object spinning about an axis will also have associated with it a kinetic energy, composed of the kinetic energies of each individual part of the object. These individual contributions may be summed up to give an expression for the total kinetic energy of the spinning object: \n\nLook this up for more
549784
All objects have gravity regardless of whether they are moving or not.\n\n  Moving and object faster has no effect on the strength of its gravitational field. You must be thinking along the lines of magnetism or something.\n\n  Gravity depends only on the mass of an object. a piece of paper sitting on a desk has a gravity field. But becuz the paper's mass is soo small, its gravity field is too weak to be noticed (even by a nearby ant).\n\n   To calculate the strength of an objects gravity field the equation is (M1*M2)/(d^(2))  where M1 = the mass of the object ur finding the gravity stregth for, M2= the mass of any reference object you are using to determine the relative strentgh and d^(2) is the distance between the 2 ojects squared.\n\nlooking at that equation you can see that speed and velocity and rotation does not matter.\n\ntherefore any object a person creates will have gravity, just not gravity thats as strong as a planet's. to do that you would have to make an object as massive as a planet!\n\nCelestial bodies rotate because of gravitational forces exerted on them, but the rotations have nothing to do with the strength of the gravity fields itself.
653943
gravity and inertia\n\nread more below. It is really fascinating.
1134237
On earth, mass and weight are equivalent, but in physics, it's more correct to use mass (since sometimes objects in physics problems are not on earth!)\n\nSo if the object weighs 1 kg, you can use 1 kg as its mass. One newton is the force needed to accelerate 1 kg (mass) at a rate of 1 meter per second^2.