Homework 2

# Homework 2 - homework 02 BAUTISTA ALDO Due 4:00 am Version...

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

1 Version number encoded for clicker entry: V1:1, V2:4, V3:2, V4:4, V5:3. Question 1 Part 1 of 1. 10 points. The graph below shows the velocity v as a function of time t for an object moving in a straight line. t v 0 t Q t R t S t P Which of the following graphs shows the corresponding displacement x as a function of time t for the same time interval? 1. t x 0 t Q t R t S t P 2. t x 0 t Q t R t S t P 3. None of these graphs are correct. 4. t x 0 t Q t R t S t P 5. t x 0 t Q t R t S t P 6. t x 0 t Q t R t S t P 7. t x 0 t Q t R t S t P correct 8. t x 0 t Q t R t S t P 9. t x 0 t Q t R t S t P Explanation: The displacement is the integral of the ve- locity with respect to time: ~x = Z ~v dt . Because the velocity increases linearly from zero at Frst, then remains constant, then de- creases linearly to zero, the displacement will increase at Frst proportional to time squared, then increase linearly, and then increase pro- portional to negative time squared. ±rom these facts, we can obtain the correct answer. t x 0 t Q t R t S t P Question 2 Part 1 of 3. 10 points. The position of a car coasting down a hill was observed at various times and the results are summarized in the table below. time distance 0 s 0 . 81 m 1 s 3 . 8 m 2 s 10 . 6 m 3 s 20 . 1 m 4 s 37 . 2 m 5 s 54 m a) ±ind the average velocity of the car dur- ing the Frst second. Correct answer: 2

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.

{[ snackBarMessage ]}

### Page1 / 6

Homework 2 - homework 02 BAUTISTA ALDO Due 4:00 am Version...

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

View Full Document
Ask a homework question - tutors are online