HW #1-2-solutions - madrid (tmm2353) HW #1-2 Antoniewicz...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: madrid (tmm2353) HW #1-2 Antoniewicz (56445) 1 This print-out should have 30 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 7) 3.0 points A spacecraft is observed to be at loca- tion ( 200 m , 300 m , 400 m ) relative to an origin located on a nearby asteroid, and 5 s later it is observed to be at location ( 475 m , 75 m , 700 m ) . Find the average ve- locity of the spacecraft, v = ( v x , v y , v z ) . What is v x in m/s? Correct answer: 55 m / s. Explanation: The average velocity of the spacecraft is calculated by finding the change of position over a change in time: v = vectorr f vectorr i t . Because vectorr is a vector, the average velocity will also be a vector and each component must be calculated separately. For v x the value becomes: v x = v 2 x v 1 x t = (475 m) (200 m) (5 s) = 55 m / s 002 (part 2 of 7) 3.0 points What is v y in m/s? Correct answer: 45 m / s. Explanation: The average velocity of the spacecraft is calculated by finding the change of position over a change in time: v = vectorr f vectorr i t . Because vectorr is a vector, the average velocity will also be a vector and each component must be calculated separately. For v y the value becomes: v y = v 2 y v 1 y t = (75 m) (300 m) (5 s) = 45 m / s 003 (part 3 of 7) 2.0 points What is v z in m/s? Correct answer: 60 m / s. Explanation: The average velocity of the spacecraft is calculated by finding the change of position over a change in time: v = vectorr f vectorr i t . Because vectorr is a vector, the average velocity will also be a vector and each component must be calculated separately. For v z the value becomes: v z = v 2 z v 1 z t = ( 700 m) ( 400 m) (5 s) = 60 m / s 004 (part 4 of 7) 4.0 points What is | vectorv | in m/s? Correct answer: 93 . 0054 m / s. Explanation: The magnitude is calculated by: | vectorv | = radicalBig v 2 x + v 2 y + v 2 z = radicalBig (55 m / s) 2 + ( 45 m / s) 2 + ( 60 m / s) 2 = 93 . 0054 m / s 005 (part 5 of 7) 3.0 points madrid (tmm2353) HW #1-2 Antoniewicz (56445) 2 Find the unit vector in the direction of the velocity of the spacecraft, v = ( v x , v y , v z ) . What is v x ? Correct answer: 0 . 591364. Explanation: The unit vector for a vector is given as : v = ( v x , v y , v z ) = ( v x , v y , v z ) | vectorv | For example: v x = v x | vectorv | = 55 m / s 93 . 0054 m / s = . 591364 006 (part 6 of 7) 3.0 points What is v y ? Correct answer: . 483843. Explanation: The unit vector for a vector is given as : v = ( v x , v y , v z ) = ( v x , v y , v z ) | vectorv | For example: v y = v y | vectorv | = 45 m / s 93 . 0054 m / s = . 483843 007 (part 7 of 7) 2.0 points What is v z ?...
View Full Document

Page1 / 7

HW #1-2-solutions - madrid (tmm2353) HW #1-2 Antoniewicz...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online