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Home Concept Builders Momentum, Collisions and Explosions Being Impulsive About Momentum Change Help Help 4

Being Impulsive About Momentum Change - Questions 4 Help

During a collision, an object experiences an impulse that changes its momentum. The impulse is equal to the momentum change. The impulse is the product of Force•∆Time. The momentum change is the product of Mass•∆Velocity. One can use the Force•∆Time = Mass•∆Velocity relationship to determine the set of collision parameters required to change the object's momentum from the initial state value to the final state value.

There are three very similar versions of this question. Each version provides a before-after diagram showing the initial and final momentum of an object. Five momentum change values are presented. One of them would cause the specified change of state. This is one of the three versions:

Version 1
Pre- and post-collision information is shown. Identify the collision parameters that are consistent with the indicated change in momentum. (A + sign indicates a rightward direction; a - sign indicates a leftward direction.)
 


 
a. ∆p = -12 kg•m/s
b. ∆p = -24 kg•m/s
c. ∆p = -8 kg•m/s
d. ∆p = -4 kg•m/s
e. ∆p = -36 kg•m/s

The diagram in this question shows a pre-collision and a post-collision momentum value. The values indicate that the momentum has changed by a certain amount. It's a negative change or loss of momentum. The amount of momentum change can be calculated by subtracting the initial value from the final value. Calculate this momentum change (∆p); you should get a negative value when done correctly. There are five momentum change values provided as possible answers. Choose the option that matches your calculation.

Try the links below to our Tutorial for more information:

Momentum

Impulse-Momentum Change Theorem

Concept Builder Teacher Notes Directions