Your browser does not support the audio element. Compared to Object B, Object A has _ momentum.Ĭlick the button below to play an audio file in a separate window. How is mass and velocity (or speed) related to the amount of momentum of an object?Ĭonsider the mass and velocity values of Objects A and B below. And if the velocity is decreasing, the object has a decreasing momentum. So if the velocity is increasing, the object has an increasing momentum. After all, momentum is the product of mass and velocity (see Formula Fix section above). The slower an object moves, the less momentum an object has. The faster an object moves, the more momentum which it has. The amount of momentum an object has depends upon how much mass it has and fast that mass is moving. What variables effect the amount of momentum of an object?Īn object which is speeding up (or slowing down) would have _. It is the product of mass and velocity that is important. It has a considerable mass but if it is parked at a rest stop it has very little momentum. It is moving considerably fast but has less momentum that a moving skateboard. One cannot be sure that it is moving fast and one cannot be sure that it has a lot of mass. Now an object with a lot of momentum must have such a mass AND such a velocity that the product of the mass and velocity is relatively large. All objects have mass so if an object is moving, then it has momentum. After all, the amount of momentum is determined as the mass multiplied by the velocity. How does one determine the direction of the momentum of an object?Īn object which has a lot of momentum can be sure to _.Īn object which has momentum can be certain to have its mass in motion. Whether it is speeding up or slowing down is insignificant. If an object is moving upward, it's momentum is upward. But don't be fooled! The rule for the direction of momentum is quite different. So if an object is moving upward and slowing down, its acceleration is downward (opposite the direction of motion whenever slowing down). For acceleration, the direction is dependent upon which way the object is moving and whether it is slowing down or speeding up.
Both are vectors and both have direction. The direction of its momentum is _.Īcceleration is often confused with momentum. What is the standard metric unit of momentum?Ī rightward moving object is slowing down. So the standard metric unit of momentum is kilograms x meters/second. The standard metric unit of velocity is meters/second. The standard metric unit of mass is the kilogram. So the units on momentum are units of mass multiplied by units of velocity. Momentum is the product of mass and velocity (see Formula Fix section above). The standard metric units of a quantity can be understood by thinking about its formula. The momentum ( p) of an object can be calculated from knowledge of its mass ( m) and velocity ( v) using the formula: p = m Which one of the following units represent the standard metric units of momentum? Is momentum a scalar or a vector quantity? Whether slowing down, speeding up or moving with a constant speed, an eastward moving object has an eastward momentum. The direction of an object's momentum is in the same direction that the object is moving. Momentum is a vector and has a direction. (Note: The exact wording of your true-false statement is randomly selected and may vary from the above wording.) Momentum is a vector quantity it has a direction associated with it. What must be true of an object if it has momentum? To have momentum an object (which is guaranteed to have mass) must be moving. To meet the definition of having momentum, an object must be moving.
We wish to identify not what could be true of an object which has momentum, but what one can be sure is true of an object which has momentum. But obviously not every object which has momentum is red, has four wheels and is located in Illinois. For instance, it could be colored red, have four wheels and be located in Illinois. Lots of things could be true of an object which has momentum. If an object has momentum, then one can be sure that the object is _. The amount of momentum which the object has depends upon how much mass it has and how fast that mass is moving. Reading: The Physics Classroom, Momentum and Its Conservation Unit, Lesson 1, Part aĪn object which has momentum can best be described as _.Īn object which has momentum has its mass in motion. The student should be able to identify the mathematical quantities which effect the momentum and be able to calculate momentum from mass and velocity. The student should be able to recognize the definition of momentum, the units of momentum and the vector nature of momentum.
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