{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

solution_pdf3

# solution_pdf3 - billing(cab4763 – HW 3 – Opyrchal...

This preview shows pages 1–2. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: billing (cab4763) – HW 3 – Opyrchal – (11109) 1 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 3) 10.0 points A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 4 m, y = 9 m, and has velocity vectorv o = (9 m / s) ˆ ı + (- 5 . 5 m / s) ˆ . The acceleration is given by vectora = (1 m / s 2 ) ˆ ı + (3 . 5 m / s 2 ) ˆ . What is the x component of velocity after 1 . 5 s? Correct answer: 10 . 5 m / s. Explanation: Let : a x = 1 m / s 2 , v xo = 9 m / s , and t = 1 . 5 s . After 1 . 5 s, vectorv x = vectorv xo + vectora x t = (9 m / s) ˆ ı + (1 m / s 2 ) ˆ ı (1 . 5 s) = (10 . 5 m / s) ˆ ı . 002 (part 2 of 3) 10.0 points What is the y component of velocity after 1 . 5 s? Correct answer:- . 25 m / s. Explanation: Let : a y = 3 . 5 m / s 2 and v yo =- 5 . 5 m / s . vectorv y = vectorv yo + vectora y t = (- 5 . 5 m / s) ˆ + (3 . 5 m / s 2 ) ˆ (1 . 5 s) = (- . 25 m / s) ˆ . 003 (part 3 of 3) 10.0 points What is the magnitude of the displacement from the origin ( x = 0 m, y = 0 m) after 1 . 5 s? Correct answer: 19 . 2058 m. Explanation: Let : d o = (4 m , 9 m) , v o = (9 m / s ,- 5 . 5 m / s) , and a = (1 m / s 2 , 3 . 5 m / s 2 ) . From the equation of motion, vector d = vector d o + vectorv o t + 1 2 a t 2 = bracketleftBig (4 m) ˆ ı + (9 m) ˆ bracketrightBig + [(9 m / s) ˆ ı + (- 5 . 5 m / s) ˆ ] (1 . 5 s) + 1 2 bracketleftBig (1 m / s 2 ) ˆ ı + (3 . 5 m / s 2 ) ˆ bracketrightBig...
View Full Document

{[ snackBarMessage ]}

### Page1 / 4

solution_pdf3 - billing(cab4763 – HW 3 – Opyrchal...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online