Use the impulse-momentum theorem to find how long the sled takes to travel

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The discussion focuses on applying the impulse-momentum theorem to determine the time it takes for a sled to travel from point A to point B, given a coefficient of kinetic friction of 0.40. The sled's initial velocity at point A is 7.4 m/s, and its final velocity at point B is 3.0 m/s. The impulse-momentum theorem is defined as impulse (j) equals force (F) multiplied by the change in time (delta t). The calculations presented indicate a misunderstanding in the application of the theorem, emphasizing the need for correct force and time relationship analysis.

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A sled slides along a horizontal surface on which the coefficient of kinetic friction is 0.40. Its velocity at point A is 7.4 m/s and at point B is 3.0 m/s. Use the impulse-momentum theorem to find how long the sled takes to travel from A to B.

(7.4)(.4)=2.96
(3)(.4)=1.2

(2.96)^2+(1.2)^2=10.2016

√10.2016= 3.19

But that's not the right answer
 
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I'm not really sure what you did..but try using the impulse momentum theorem and then remember that impulse=j=F*(delta t)
 

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