Which produces the greater change in kinetic energy

Momentum, like other vector quantities, is subject to the rules of vector operations. Having mass gives an object inertia. When that inertia is in motion, the object has momentum. TRUE - This is true. However, one should be quick to note that the object does not have to have a constant speed in order to have momentum.

If an object is traveling eastward, then it has an eastward momentum. If the object is slowing down, its momentum is still eastward. Only its acceleration would be westward. FALSE - To say that momentum is a conserved quantity is to say that if a system of objects can be considered to be isolated from the impact of net external forces, then the total momentum of that system is conserved. In the absence of external forces, the total momentum of a system is not altered by a collision.

However, the momentum of an individual object is altered as momentum is transferred between colliding objects. TRUE - Momentum is calculated as the product of mass and velocity. As the speed of an object increases, so does its velocity.

As a result, an increasing speed leads to an increasing momentum - a direct relationship. TRUE - For the same speed and thus velocity , a more massive object has a greater product of mass and velocity; it therefore has more momentum. FALSE - A less massive object would have a greater momentum owing to a velocity which is greater than that of the more massive object. Both are equally important. The direction of any vector would never enter into a size comparison. TRUE - Objects with a changing speed also have a changing velocity.

As such, an object with a changing speed also has a changing momentum. Which of the following are true about the relationship between momentum end energy? Momentum is momentum and energy is energy.

Momentum is NOT a form of energy; it is simply a quantity which proves to be useful in the analysis of situations involving forces and impulses. TRUE - If an object has momentum, then it is moving. If it is moving, then it has kinetic energy. And if an object has kinetic energy, then it definitely has mechanical energy. However, it could have some potential energy and thus have mechanical energy.

Object A clearly has more momentum. However, Object B has the greatest kinetic energy. The kinetic energy of A is 45 J and the kinetic energy of B is J. Once the object reaches velocity v , its kinetic energy can be expressed as a function of its velocity and of its mass.

If you take M to be the mass of the massive object and m to be the mass of the lighter object, you can say that. This means that when two objects are moving with the same velocity , the object that has the greater mass will have the higher kinetic energy.

Let's take a numerical example to illustrate this idea. You can test this yourself by trying to push a bicycle and a car to the same velocity. The one that is harder to push will have the higher kinetic energy once it gets to that velocity.

Does a moving massive object have more kinetic energy than a lighter object? Physics Work and Energy Energy. Stefan V. Perhaps the most important property of kinetic energy is its ability to do work.

Work is defined as force acting on an object in the direction of motion. Work and energy are so closely related as to be interchangeable. If we want to change the kinetic energy of a massive object, we must do work on it. For example, in order to lift a heavy object, we must do work to overcome the force due to gravity and move the object upward. If the object is twice as heavy, it takes twice as much work to lift it the same distance.

It also takes twice as much work to lift the same object twice as far. Similarly, to slide a heavy object across a floor, we must overcome the force of friction between the object and the floor. The work required is proportional to the weight of the object and the distance it is moved. Note that if you are carrying a piano on your back down a hallway, you are not actually doing any real work.