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Assignment 2: (Fall 2013)
TOTAL MARKS: 35
Due Date: 09/12/2013
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Question # 1
Find out the magnitude and direction of the overall acceleration in the fig shown? Marks = 6
Question # 2
In its natural state, an average of 5.5×106Kg of water flowed per second over Niagara Falls, falling 55m. If all the work done by gravity could be converted into electric power as the water fall to the bottom, how much power would the falls generate? Marks = 8
Question # 3
The solid uniform disk rolls without slipping. What is its kinetic energy as shown figure? Marks =8
Question # 4
How much work is done when the wheel rotates shown in the figure? Marks = 6
Question # 5
The tunable shown above makes a record rotate at 33.3 revolutions per minute. If the linear speed of an ant located at radius r is v, what is the linear speed of a point on the outer edge of the record at radius 3r? Marks = 3+4
a. also v
Write the reason of your above selected choice as well.
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Answer of question no.3 is
A rolling disk will have two forms of KE,
K.E=angular K.E + linear K.E
I = 1/2mr²
= 0.222 kg-m²
= 0.267 J
= 0.533 J
Total K.E=Angular K.E + Linear K.E
= 0.267 + 0.533
= 0.800 J
Answer of question no.4 is
Answer of question no. 5 is
Velocity is the angular velocity times the radius.
v ∝ r
Answer of question no.2 is
W=Potential Energy = mgh Hint=work done is converted in electric energy
tarik bhai q2 me apny 5.5 ko maltiply nhe kiya
W=(5.5×106Kg)(9.8)(55) r agr 5.5 se maltiply krn tu 163047.5 *10 power 6 answer ata hy kiya ye tik hy ya jo apny kiya wo??????plzzz hlep me.....thanks
m = 5.5*106 kg
This wrong value
This is 5.5*10^6
10 power 6
2964.5 *10 pow 6
I enter the value in potential energy is 2964.5 × 10 power 6 .Power is not working in replay but u enter the value 10 power 6 it is not 106
Answer of question 1 is
Centripetal acceleration ( a c )=0.75 m/s2
tangential acceleration ( a t )=0.45 m/s2