The considerably greater mass of the Mack truck gives it a considerably greater momentum. Consider a Mack truck and a roller skate moving down the street at the same speed. Both variables are of equal importance in determining the momentum of an object. The Momentum Equation as a Guide to Thinkingįrom the definition of momentum, it becomes obvious that an object has a large momentum if both its mass and its velocity are large. As a vector quantity, the momentum of an object is fully described by both magnitude and direction. If the bowling ball is moving westward, then its momentum can be fully described by saying that it is 10 kg In a previous unit, it was said that the direction of the velocity vector is the same as the direction that an object is moving. The direction of the momentum vector is the same as the direction of the velocity of the ball. m/s of momentum the momentum of the ball is not fully described until information about its direction is given.It is not enough to say that the ball has 10 kg To fully describe the momentum of a 5-kg bowling ball moving westward at 2 m/s, you must include information about both the magnitude and the direction of the bowling ball. As discussed in an earlier unit, a vector quantity is a quantity that is fully described by both magnitude and direction. This is consistent with the equation for momentum. In each of these examples, a mass unit is multiplied by a velocity unit to provide a momentum unit. m/s is the standard metric unit of momentum, there are a variety of other units that are acceptable (though not conventional) units of momentum.The standard metric unit of momentum is the kg The units for momentum would be mass units times velocity units. The equation illustrates that momentum is directly proportional to an object's mass and directly proportional to the object's velocity. Where m is the mass and v is the velocity. Thus, the above equation can be rewritten as p = m In physics, the symbol for the quantity momentum is the lower case p. In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object. Momentum depends upon the variables mass and velocity. The amount of momentum that an object has is dependent upon two variables: how much stuff is moving and how fast the stuff is moving. Momentum can be defined as "mass in motion." All objects have mass so if an object is moving, then it has momentum - it has its mass in motion. If an object is in motion ( on the move) then it has momentum. A sports team that is on the move has the momentum. Momentum is a physics term it refers to the quantity of motion that an object has. A team that has a lot of momentum is really on the move and is going to be hard to stop. A team that has the momentum is on the move and is going to take some effort to stop. Momentum is a commonly used term in sports. The sports announcer says, "Going into the all-star break, the Chicago White Sox have the momentum." The headlines declare "Chicago Bulls Gaining Momentum." The coach pumps up his team at half-time, saying "You have the momentum the critical need is that you use that momentum and bury them in this third quarter." Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License. We recommend using aĪuthors: Paul Peter Urone, Roger Hinrichs Use the information below to generate a citation. Then you must include on every digital page view the following attribution: If you are redistributing all or part of this book in a digital format, Then you must include on every physical page the following attribution: If you are redistributing all or part of this book in a print format, Want to cite, share, or modify this book? This book uses the
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