Class Management i Help Homework 1 Begin Date: 1/15/2018 12:00:00 AM -- Due Date
ID: 1573247 • Letter: C
Question
Class Management i Help Homework 1 Begin Date: 1/15/2018 12:00:00 AM -- Due Date: 1/29/2018 11:59:00 PM End Date: 1/29/2018 11:59:00 PM (8%) Problem 11: A football quarterback runs 12 m straight down the playing field in 2.6 s (in the positive direction). He is then hit and pushed 2.5 m straight backwards in 1.9 s. He breaks the tackle and runs straight forward another 24 m in 5.2 s 25% Part (a) Calculate the quarterback's average velocity in the horizontal direction during the first interval, in meters per second 25% Part (b) Calculate the quarterback's average velocity in the horizontal direction during the second interval, in meters per second Grade Summary Deductions Potential V2 2% 98% sinO tan() ( Submissions Attempts remaining: 3 cos cotan0 asin coso atanO acotan) sinh(0 4 5 6 % per attempt) detailed view 0% 0% 0% 0% cosh0 t cotnhO tanh0 0 Degrees O Radians 0 4 Submit I give up! Hints: 1 for a 2% deduction. Hints remaining: 0 Feedback: 2% deduction per feedback. The direction of this motion is defined in the original problem taternent 25% Part (c) Calculate the quarterback's average velocity in the horizontal direction during the third interval in meters per second D 25% Part (d) Calculate the quarterback's average velocity in the horizontal direction for the entire motion, in meters per secondExplanation / Answer
Part (a) -
Average velocity during first interval = 12/2.6 = 4.62 m/s
Part (b) -
Average velocity during second interval = -2.5 / 1.9 = -1.32 m/s
Part (c) -
Average velocity during third interval = 24 / 5.2 = 4.62 m/s
Part (d) -
Now to determine the total average velocity for the entire motion, we should use the following expression -
Total average velocity = total displacement/ total time
Total displacement = 12 - 2.5 + 24 = 33.5 m
Total time = 2.6 + 1.9 + 5.2 = 9.7 s
Therefore, the total average velocity = 33.5 / 9.7 = 3.45 m/s