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No. If the momentum of a pair of objects is zero sitll they can have kinetic energy.For example, in the case of bullet and gun, before firing the bullet the total momentum is zero and according to the law of conservation of momentum, the total momentum after firing the bullet will also be zero. But still they both will have kinetic energy.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agomomentum = mass times velocity
potential energy (in the gravitational sense), at the earth's surface is mass*g*h
where g=grav constant; h=height of object. The two equations don't share common values, apart from mass, which indicates that, whilst zero mass would mean zero momentum and zero potential energy, the other values, such as velocity, height are independent.
So this is not true. Potential energy is the energy in a system that does not involve motion, normally. It is normally energy that has the potential to create motion though, by moving a massive object through a distance by producing a force, where the force is equal to the change in potential per unit length in the direction that the force acts. If you lift a brick up some stairs, you will be increasing its potential energy, but when you get to the top and stop moving, it will still have the potential energy you gave it, but since you have stopped moving it, it will now have no kinetic energy. Kinetic energy is half m v squared, or the momentum squared over two times the mass.
Indeed, in simple harmonic motion, a pendulum swinging back and forwards, when that pendulum reaches max displacement from the centre of equilibrium (the centre of the swing point), it will have no kinetic energy, and therefore no momentum, but the potential energy will be at a maximum.
Wiki User
∙ 11y agoIf Kinetic energy (KE)=0 then its velocity must be zero since KE=0.5mv^2
Therefore momentum (mv) must be zero.
Wiki User
∙ 11y agoThe product of (mass) x (velocity) must be zero.
In order for that to happen, either the (mass), or
the (velocity), or both, must be zero.
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How does kinetic energy and potential energy switch?
work=change in kinetic energy, doing work on an object by moving it up increases that object's potential energy because it has the POTENTIAL to fall due to gravity. kinetic energy is lost in the movement of the object. However, throughout an entire closed system, the total energy in joules (or kinetic enery plus potential energy) does remain constant. this is useful because the initial energy and the final energy most be equal, and if thats true, then initial kinetic energy plus initial potential energy must equal final kinetic energy plus final potential energy. does that help?
Can potential energy ever be less than kinetic energy?
The answer to both of your questions lies in the different nature of both quantities, momentum and kinetic energy. Momentum is a vector, kinetic energy is a scalar. This means that momentum has a magnitude and a direction, while kinetic energy just has a magnitude. Consider the following system: 2 balls with equal mass are rolling with the same speed to each other. Magnitude of their velocities is the same, but the directions of their velocities are opposed. What can we say about the total momentum of this system of two balls? The total momentum is the sum of the momentum of each ball. Since masses are equal, magnitudes of velocities are equal, but direction of motion is opposed, the total momentum of the system of two balls equals zero. Conclusion: the system has zero momentum. What can we say about the total kinetic energy of this system? Since the kinetic energy does not take into account the direction of the motion, and since both balls are moving, the kinetic energy of the system will be different from zero and equals to the scalar sum of the kinetic energies of both balls. Conclusion: we have a system with zero momentum, but non-zero kinetic energy. Assume now that we lower the magnitude of the velocity of one of the balls, but keep the direction of motion. The result is that we lower the total kinetic energy of the system, since one of the balls has less kinetic energy than before. When we look to the total momentum of the new system, we observe that the system has gained netto momentum. The momentum of the first ball does not longer neutralize the momentum of the second ball, since the magnitudes of both velocities are not longer equal. Conclusion: the second system has less kinetic energy than the first, but has more momentum. If we go back from system 2 to system 1 we have an example of having more kinetic energy, but less momentum. I hope this answers your question Kjell
Reactants and products in an energy diagram?
Activation energy is the distance from the reactants to the top of the "hill."
Why is the potential energy converted into kinetic energy?
Because all energy must be transferred. It's the first law of thermodinamics: energy can't be created or destroyed. It can only change forms.
What kind of energy does not come from the sun?
Nuclear energy. Other forms like fossil fuels, hydro, solar, wind, biomass, depend on the sun.
An object that has linear momentum must also have?
Momentum. The formula for kinetic energy is: KE = .5 * m *v^2 The formula for momentum is: p = m * v If an object has kinetic energy, then both mass and velocity are non-zero, which implies that the momentum is also non-zero.
If an object has kinetic energy then it must also have potential energy?
FALSE
A moving object must have potential energy?
An object that has kinetic energy must have momentum, velocity, and speed. Momentum is mass times velocity. Kinetic energy is mass times velocity squared. Speed is distance divided by time. Kinetic energy is the energy of the object's motion. An object that has kinetic energy must have momentum because is the force or speed of movement. For example the ball gained momentum as it rolled down the hill. An object that has kinetic energy must have momentum, velocity, and speed because if an object is in motion (has kinetic energy) it must be either gaining, losing, or at a constant momentum, it must have a velocity (basically speed) and speed because when an object is in motion, it MUST have a certain velocity or speed.
Which can be described as in an isolated system momentum is always conserved?
Briefly, the only way for an object to change its momentum is by transferring momentum to another object - in other words, the other object will receive a change in momentum in the opposite direction.
How does an object with higher momentum move?
Momentum is the product of velocity and mass - so to have a "higher momentum", the object must either be more massive, or it must move faster.
To have momentum an object must be?
Momentum = m v (mass, velocity). If either one is zero, momentum is zero. So in order to have momentum, an object must have both mass and speed, in the frame of reference.
Which factors must be know to calculate an object gravitational potential energy?
Mass speed
What factors must be known to calculate an object gravitational potential energy?
its mass and height
Which factors must be known to calculate an object's gravitational potential energy?
To calculate an object's gravitational potential energy, the following factors must be known: Mass of the object: The gravitational potential energy of an object depends on its mass. The greater the mass of the object, the greater the gravitational potential energy. Height or distance: The gravitational potential energy of an object also depends on its height or distance from the reference point. The greater the height or distance of the object from the reference point, the greater the gravitational potential energy. Acceleration due to gravity: The gravitational potential energy of an object also depends on the acceleration due to gravity at the location of the object. The acceleration due to gravity is a constant value on the surface of the Earth, approximately equal to 9.8 meters per second squared. The formula for gravitational potential energy is: PE = mgh Where PE is the gravitational potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or distance of the object from the reference point.
If an object's mechanical energy is equal to its potential energy how much kinetic energy does it have?
Mechanical Energy= Potential energy+ Kinetic energy, so for the mechanical energy to be equal to be potential energy, the kinetic energy must be 0.
When calculating gravitational potential energy you must use?
the distance between the object and the center of the Earth
The momentum of an object depends on what two factors?
For an object to have momentum, it must have mass and velocity.
