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In the absence of external forces, the total momentum of a system is not altered by a collision. 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.
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Only its acceleration would be westward.į. If the object is slowing down, its momentum is still eastward. If an object is traveling eastward, then it has an eastward momentum. FALSE - The direction of an object's momentum vector is in the direction that the object is moving. However, one should be quick to note that the object does not have to have a constant speed in order to have momentum.Į. When that inertia is in motion, the object has momentum.ĭ. FALSE - An object has momentum if it is moving. The kg m/s is the standard unit of momentum.Ĭ. FALSE - The Joule is the unit of work and energy. Momentum, like other vector quantities, is subject to the rules of vector operations.ī. Like all vector quantities, the momentum of an object is not fully described until the direction of the momentum is identified. An object with a changing speed will have a changing momentum.Ī.The forward moving object will have the greatest momentum. Two identical objects are moving in opposite directions at the same speed.A less massive object can never have more momentum than a more massive object.Two objects of different mass are moving at the same speed the more massive object will have the greatest momentum.The momentum of an object varies directly with the speed of the object.Momentum is a conserved quantity the momentum of an object is never changed.An object can be traveling eastward and slowing down its momentum is westward.An object which is moving at a constant speed has momentum.An object with mass will have momentum.The standard unit on momentum is the Joule.Which of the following statements are true about momentum? Momentum and Collisions - Home || Printable Version || Questions with LinksĪnswers to Questions: All || #1-5 || #6-36 || #37-56 || 57-72ġ. To sum up, we can say that, momentum of the system is conserved in both elastic and inelastic collisions however kinetic energy is conserved only in the elastic collisions.The Review Session » Momentum and Collisions » Answers Momentum and Collisions Review Navigate to: On the other hand if the momentum of the object is conserved but kinetic energy is not conserved than we call this type of collision “inelastic collision”. If the objects collide and momentum and kinetic energy of the objects are conserved than we call this collision “elastic collision”. If there is no force applied on the system then momentum of the system is conserved in magnitude and direction. Impulse and momentum are directly related to each other. It has the same direction with applied net force. Impulse is also a vector quantity having both magnitude and direction. In summary, I try to say that impulse is the multiplication of applied force and time interval it applied.
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However, if you apply force on an object long period of time then you see the amount of change in momentum is bigger than the first situation. If you apply a force on an object 1 s then you see small change in the momentum. Unit of the momentum is kg.m/s as you can guess from the equation. Where p is the momentum and m is the mass In other words for talking about momentum we must have moving object, it must have both mass and velocity. Momentum is a physical concept that is defined as “moving body”.