Therefore, we’ll calculate the force on the meteor and then use Newton’s third law to argue that the force from the meteor on Earth was equal in magnitude and opposite in direction. It is conceptually easier to reverse the question and calculate the force that Earth applied on the meteor in order to stop it. (credit: modification of work by “Shane.torgerson”/Wikimedia Commons) The amount by which the object’s motion changes is therefore proportional to the magnitude of the force, and also to the time interval over which the force is applied.įigure 9.7 The Arizona Meteor Crater in Flagstaff, Arizona (often referred to as the Barringer Crater after the person who first suggested its origin and whose family owns the land). Alternatively, the more time you spend applying this force, again the larger the change of momentum will be, as depicted in Figure 9.5. Clearly, the larger the force, the larger the object’s change of momentum will be.
PROPULSION TIME CALC FREE
Suppose you apply a force on a free object for some amount of time. The purpose of this section is to explore and describe that connection.
This indicates a connection between momentum and force. Therefore, if an object’s velocity should change (due to the application of a force on the object), then necessarily, its momentum changes as well. We have defined momentum to be the product of mass and velocity.
Apply the impulse-momentum theorem to solve problems.By the end of this section, you will be able to:
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