SciencePhysics
posted by Shweta .
20 (part 1 of 2)
The initial speed of a body is 6.61 m/s.
What is its speed after 3.92 s if it accelerates
uniformly at 3.46 m/s/s?
Answer in units of m/s
21 (part 2 of 2) 10.0 points
What is its speed after 3.92 s if it accelerates
uniformly at −3.46 m/s/s?
Answer in units of m/s
What is the answer for 21?

Initial speed plus the acceleration times the time.
6.61 m/s + 3.46 m/s/s times 3.92 s
6.61 m/s + ____ m/s (fillin the blank with 3.46 times 3.92).
The same principle applies, but you will be multiplyint by 3.46 which will result in a decrease in the speed.