okay Im not sure what the right answer is out of these multiple choices because Im not sure how exactly to use F delta T.(adsbygoogle = window.adsbygoogle || []).push({});

A 4.0-N force acts for 3.0 sec on an object. The force suddenly increases to 15 N and acts for one more second. What impulse was imparted by these forces to the object?

a. 12 Ns

b. 15 Ns

c. 16 Ns

d. 27 Ns

I got like...both A and B as possible answers but im not sure which one is right..I used F delta T to get 12 because I just did 4 x 3. Then I got 15 by doing 15 x 1. Im not sure how to use the change in time... when i played around with it i was getting numbers that were not any of the choices. Any help is much appreciated.

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# P = F delta T!

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