Question

In: Physics

1. The treasure map in the figure gives the following directions to the buried treasure: "Start...

1. The treasure map in the figure gives the following directions to the buried treasure: "Start at the old oak tree, walk due north for 510 paces, then due east for                 150 paces. Dig." But when you arrive, you find an angry dragon just north of the tree. To avoid the dragon, you set off along the yellow brick road at an angle 60                 ^\circ east of north. After walking 350 paces you see an opening through the woods.


a. Which direction should you go to reach the treasure?

b. How far should you go to reach the treasure?


2. A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. The plane flies 190m  above the glacier at a speed of 160m/s .


a. How far short of the target should it drop the package?



3. An old-fashioned single-play vinyl record rotates on a turntable at 48.0rpm . What are (a) the angular velocity in rad/s and (b) the period of the motion?


4. Your roommate is working on his bicycle and has the bike upside down. He spins the 70.0cm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second.


a. What is the pebble's speed?


b. What is the pebble's acceleration?


Solutions

Expert Solution

Let due north be positive y-direction
Let due east be positive x-direction

Location that you want to arrive at is: (100, 550)

Using the alternate path:
X: 350 cos (90 - 60) = 303.10
Y: 350 sin (90 - 60) = 175

So to reach treasure, you will need to travel a distance of:
D^2 = (150 - 303.10)^2 + (510 - 175)^2
D = 368.32 paces

Direction:
Tan (theta) = (Y/X)
theta = arctan(Y/X)
theta = arctan(175 / 303.10)
theta = 30.00 North of West


2) The time it takes to fall ( not including air friction ) is

t= sqrt ( 2 X distance of fall )/ 9.8 )) = 6.22 sec

Traveling at 114 m/s you'd have to release the package

6.22 * 160 = 996.31 m before the target



3) 1 rpm = 0.104

48 rpm = 5.026 rad/s

period of motion = 2* pi/w

w= angular velocity

2 * 3.14/ 6.59 = 0.59


4) Frequency of the pebble is f = 3 Hz.

angular velocity ?= 2? f. = 6?
Linear speed or velocity v = r ? = [0.70/2]*6? = 6.59m/s
===============================

Acceleration = v^2 /r = 6.59^2 / 0.35 = 124.08 m/s^2 toward the center of the wheel.


Related Solutions

The treasure map in the figure gives the following directions to the buried treasure: "Start at...
The treasure map in the figure gives the following directions to the buried treasure: "Start at the old oak tree, walk due north for 510 paces, then due east for 130 paces. Dig." But when you arrive, you find an angry dragon just north of the tree. To avoid the dragon, you set off along the yellow brick road at an angle 60? east of north. After walking 360 paces you see an opening through the woods. (Figure 1) Part...
a) A treasure map gives the following directions: (1) Walk fifty meters at 30 degrees north...
a) A treasure map gives the following directions: (1) Walk fifty meters at 30 degrees north or east from the old oak tree. (2) Turn 45 degrees to your left (you should now be facing 75degrees north of east) and walk another fifty meters. You will find the treasure buried under a rock. What straight-line path would take you directly from the old oak tree to the rock with the treasure buried under it? b) You followed the first direction...
You find a pirate map which describes the path to a buried treasure. Starting from an...
You find a pirate map which describes the path to a buried treasure. Starting from an old oak tree in a field, the map instructs you to walk 16.0 meters due west, then turn in the direction 30.0 degrees north of east and walk an additional 21.0 meters. Finally, you need to walk 7.50 meters due south to where the treasure is buried. How far away from the base of the oak tree and in what direction is the treasure...
You are a famous archaeologist/treasure hunter ́a la Indiana Jones. After following a treasure map you...
You are a famous archaeologist/treasure hunter ́a la Indiana Jones. After following a treasure map you find yourself deep inside a Babylonian temple. As you reach the end of a long corridor you find it splits into two paths. Above the first path you make out some text carved into the rock. Shining your torch you manage to make out the following two inscriptions on the wall: 1. L1 ∧ T2 2. (L1 ∧T2)∨(L2 ∧T1) Knowing that the Babylonians were...
While following a treasure map, you start at an old oak tree. You first walk 875 mm directly south, then turn and walk 1.33 km at 30.0° west of north
  While following a treasure map, you start at an old oak tree. You first walk 875 mm directly south, then turn and walk 1.33 km at 30.0° west of north, and finally walk 1.00 km at 32.0° north of east, where you find the treasure: a biography of Isaac Newton! 1) To return to the old oak tree, in what direction should you head? Use components to solve this problem. Express your answer in degrees. 2) How far will...
In a book named Treasure, the reader has to figure out where a 2.2 pound, 24...
In a book named Treasure, the reader has to figure out where a 2.2 pound, 24 kt gold horse has been buried. If the horse is found, a prize of $27,067 a year for 20 years is provided. The actual cost to the publisher to purchase an annuity to pay for the prize is $284,200. What interest rate (to the nearest percent) was used to determine the amount of the annuity? (Assume end-of-year payments.) (Round factor values to 5 decimal...
I am supposed to map out the following and can't figure out how to do it!...
I am supposed to map out the following and can't figure out how to do it! Can somebody help? The experiment has to do with determining the simplest formula of potassium chlorate and to determine the original amount of potassium chlorate in a potassium chlorate-potassium chloride mixture by measuring the oxygen lost from decomposition. The chemical reaction is 2KClO3(s) ------> 2KCL(s) + 3 O2(g) I am supposed to map out 1. Mass of oxygen lost in the first part 2....
Draw a mind map of Business Environments, Ethics and Strategy. (Hint: Start your mind-map with three...
Draw a mind map of Business Environments, Ethics and Strategy. (Hint: Start your mind-map with three boxes at the center, one for each of Environments, Ethics, and Strategy.) and a short summary of this mind map not more than 100 words.
Directions 1. Start up IDLE3.8 and open a scripting window. 2. Write a program to solve...
Directions 1. Start up IDLE3.8 and open a scripting window. 2. Write a program to solve the following problem: functions - The program should input 3 integers, do calculations and print results. You need to write 4 functions for average, smallest, largest and middle as well as writing a main(). Use the main() for input, calling functions and output. Enter a number...6 Enter a number...2 Enter a number...11 Average = 6.33 Smallest = 2 Largest = 11 Numbers in order...
The map of the lac operon is:    POZY   The promoter (P) region is the start site of...
The map of the lac operon is:    POZY   The promoter (P) region is the start site of transcription through the binding of RNA polymerase before actual mRNA production. Mutationally altered promoters (P-) cannot bind RNA polymerase. Certain predictions can be made about the effect of P- mutations. Use your predictions and your knowledge of the lactose system to complete the following table. Insert a “+” where an enzyme is produced and a “-“ where no enzyme is produced. The first one...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT