Prepare for your exams
Get points
Guidelines and tips
Sell on Docsity
Docsity AI

Prepare for your exams

Study with the several resources on Docsity

Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips

Sell on Docsity

Docsity AI

Log in Sign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search for your university

Find the specific documents for your university's exams

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents

20 Points

For each uploaded document

Answer questions

5 Points

For each given answer (max 1 per day)

All the ways to get free points

Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

Quiz 3C Solutions for Basic Physics I | Physics 3, Quizzes of Physics

University of California - Irvine Physics

Material Type: Quiz; Class: BASIC PHYSICS I; Subject: Physics; University: University of California - Irvine; Term: Unknown 1989;

Typology: Quizzes

Pre 2010

Uploaded on 09/17/2009

koofers-user-xgi-1 🇺🇸

10 documents

1 / 2

This page cannot be seen from the preview

Don't miss anything!

Physics 3A: Basic Physics I

Quiz #3c : Solutions

Name:XXXXXXXXXXXXXXXXXXX___

Student ID #:_________________________

Discussion Section:____________________

Date:________________________________

Signature:____________________________

vxf



vicos



i





constant

vyf



visin



i



gt

xf



xi



vicos



i



t

yf



yi



vicos



i



t



1

2gt2

ac



v2

r

at



d

 

v



d t

yf





tan



i



xf





g

2vi

2cos2



i



xf

2

T



2



r

v

h



vi

2sin2



i



2g

R



vi

2sin



2



i



g

ar





ac





v2

r



vPO'



vPO



vO ' O

g



9.80 m



s2

(circle the letter of your answer)

1. (2 pts) A blue BMW car is driven off a horizontal cliff. One second later a red VW

car is driven off the same cliff with the same velocity as the BMW. At what point in

the motion after the VW leaves the cliff will the two cars be the closest to each other?

Only consider times prior to the BMW hitting the ground. (ignore air resistance)

a.) Just before the BMW hits the ground

b.) Just as the VW leaves the cliff

c.) When the VW is halfway to the ground

d.) Depends on the relative masses of the two cars

e.) Not enough information to tell

2. (2 pts) A ball is thrown at an angle of 45 degrees relative to horizontal. Which of the

following quantities of the resulting motion are constant during the motion:

a.) magnitude of its velocity and magnitude of its acceleration

b.) direction of its velocity and direction of its acceleration

c.) vertical component of velocity and magnitude of velocity

d.) horizontal component of its velocity and its acceleration

e.) None of the above

3. (6 pts) You swing your TA on the end of a string around in a circle of radius 1.50 m,

at a height above the ground of 2.25 m, parallel to the ground. The string breaks and

your TA hits the ground d meters (horizontally) away from the point on the ground

directly below the break point. If the centripetal acceleration is 4.20 m/s2, what is d?

(use back of sheet as well, circle your final answer and show all work)

Discover Quizzes of Physics University of California - Irvine

Partial preview of the text

Download Quiz 3C Solutions for Basic Physics I | Physics 3 and more Quizzes Physics in PDF only on Docsity!

Physics 3A: Basic Physics I Quiz #3c : Solutions

Name:XXXXXXXXXXXXXXXXXXX___ Student ID #:_________________________ Discussion Section:____________________ Date:________________________________ Signature:____________________________

vxf vi cos

i

constant^ vyf

vi sin^

i g t^ x^ f

xi vi cos^

i t

y f yi vi cos

i t^^

g t^2 ac v

2 r

at

d v d t

y f

tan^

i x^ f

g 2 vi^2 cos^2

^

i

x^2 f

T

2 r v

h

vi^2 sin^2

^

i

2 g

R

vi^2 sin

i

g

ar ac

v^2 r

vPO ' vPO vO ' O

g 9.80 m s^2

(circle the letter of your answer)

(2 pts) A blue BMW car is driven off a horizontal cliff. One second later a red VW car is driven off the same cliff with the same velocity as the BMW. At what point in the motion after the VW leaves the cliff will the two cars be the closest to each other? Only consider times prior to the BMW hitting the ground. (ignore air resistance)

a.) Just before the BMW hits the ground b.) Just as the VW leaves the cliff c.) When the VW is halfway to the ground d.) Depends on the relative masses of the two cars e.) Not enough information to tell

(2 pts) A ball is thrown at an angle of 45 degrees relative to horizontal. Which of the following quantities of the resulting motion are constant during the motion:

a.) magnitude of its velocity and magnitude of its acceleration b.) direction of its velocity and direction of its acceleration c.) vertical component of velocity and magnitude of velocity d.) horizontal component of its velocity and its acceleration e.) None of the above

(6 pts) You swing your TA on the end of a string around in a circle of radius 1.50 m, at a height above the ground of 2.25 m, parallel to the ground. The string breaks and your TA hits the ground d meters (horizontally) away from the point on the ground directly below the break point. If the centripetal acceleration is 4.20 m/s^2 , what is d? (use back of sheet as well, circle your final answer and show all work)

Look at x: xf d^ xi

vix t^ ^0

vi cos

t vi t need t and vi get vi from

centripetal acceleration: ac v

2

r

so v ^ ac r ^

1.50 2.51 m s

for t, use y-direction: yf yi viy t

g t^2 yi vi sin

t

g t^2 yi

g t^2

solve for t: t

yi yf

g

2.25^ 0.00^

0.677 s

Quiz 3C Solutions for Basic Physics I | Physics 3, Quizzes of Physics

Related documents

Partial preview of the text

Download Quiz 3C Solutions for Basic Physics I | Physics 3 and more Quizzes Physics in PDF only on Docsity!

vxf vi cos

i

i  g t^ x^ f

xi  vi cos^

i t

y f yi  vi cos

i t^^ 

g t^2 ac v

at

y f

i x^ f 

^

i

T

h

^

i

R

i

ar  ac 

vPO '  vPO  vO ' O

g 9.80 m s^2

Look at x: xf d^ xi

vix t^ ^0

t vi t need t and vi get vi from

centripetal acceleration: ac v

so v ^ ac r ^

1.50 2.51 m s

for t, use y-direction: yf yi  viy t 

g t^2 yi  vi sin

t 

g t^2 yi 

solve for t: t

yi  yf

2.25^  0.00^

put into x: d vi t 2.

1.70 m

i g t^ x^ f

xi vi cos^

y f yi vi cos

i t^^

i x^ f

ar ac

vPO ' vPO vO ' O

g 9.80 m s^2

so v ^ ac r ^

1.50 2.51 m s

for t, use y-direction: yf yi viy t

g t^2 yi vi sin

t

g t^2 yi

yi yf

2.25^ 0.00^