Exam 1 Practice Problems - University Physics I | PHYS 2050, Exams of Physics

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X1.

PHYS-205(6) (Kaldon-40534)

Name ______________________________________________

Exam 1 - 100,000 points + 20,000WMU-Fall 2000

(^)
(^) points

Book Title __________________________________________

9/20/2000•Rev.

State Any Assumptions You Need To Make – Show All Work – Circle Any Final Answers Use Your Time Wisely – Work on What You Can – Be Sure to Write Down Equations

Feel Free to Ask Any Questions

2a

2b

2c

2e

“Flat Out Like A Lizard Drinking”

AUSSIE FOR

“DOING SOMETHING VERY FAST

”

(50,000 points)

(a) What was Misty’s average speed?meter Butterfly, setting a new Olympic Record in 2:05.88.Hyman upset two of the best Australian swimmers in the 200. 1.) In the land Down Under (tape delayed, of course) Misty

Note that the time is 2 minutes, 5.88 seconds, not 2 hours…

Assuming that Misty has (b) To dive into the pool, the swimmers start 1.45 m above the water.

(^) v 0y (^) = 0

(^) , how much time does it take for her to

fall into the water?

(c) What is the

(^) y- component of her velocity when she hits the water?

Can be done with or without (b).

(d) Assuming that

(^) v x is the average speed of the race, find the vector velocity,

(^) v
(^) , in standard form.

If you

Find the acceleration needed to go from the average speed of the race in a distance of 1.21 m. (e) The 200. m races are swum in four lengths of the pool. That means that you have to make three turns. didn’t get an answer to (a) use a speed of 4.26 m/s; if you didn’t get (c), use a speed of 5.43 m/s.

If you

didn’t get an answer to (a) use a speed of 4.26 m/s.

Physics 205 / Exam 1

Fall 2000

Page 2

“Survivor Physics: The Star Problem Immunity Challenge”

(50,000 points)

2.) An object’s equation of motion is

x t

m

m

s t

m s t m s t

( )

.

(.

/

)

(.

/

)

(.

/

)







(^2)

(^2)

(^6) 6

.^

(a) Find the equation for the vector acceleration of this object.

(b) Find the equation for the vector velocity of this object.

(c) Find the equation for the vector position of this object.

(d) Sketch the vector

A

= 22.7 m/s @ 222°

(^) and find

A

x and

(^) A y .

(e) An object has its ninth derivative of

(^) x (^) with respect to time as

d td x

m

s

9 9

9

.

/

.

All

(^) of the constants

of integration are zero. Find the position,

(^) x , at time

(^) t = 0

.