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PHY101 Physics Assignment no 01 solution and discussion due date 27-11-2014

PHY101 Physics Assignment no 01 solution and discussion due date 27-11-2014

Assignment 1: (Fall 2014)
PHYSICS (PHY101)
TOTAL MARKS: 25
Due Date: 27/11/2014
DON’T MISS THESE Important instructions:
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Question. No: 1
A set of frictionless wheels are attached to the bottom of a box, which is then measured and found to have a mass of 6.0kg. The box is placed on the floor, and a student of Physics uses a brief horizontal force of 150N to push the box sideways, after which the box rolls across the floor with constant velocity. How much Work does the floor do on the box as it rolls along?
Marks 6
Question. No: 2
A student of Physics with a mass of 60Kg performs an experiment by taking a scale into an elevator, setting it into floor, and standing on it. At first the scale indicates a weight of about 600Newtons, but then the elevator starts to accelerate downwards at 5m/s2.Calculate the value of weight indicated on the scale during this period of acceleration?
Taking acceleration due to gravity (g) = 10m/s2. Marks 5
Question. No: 3
An astronaut standing on the moon holds a large, heavy rock and a small, light stone, and then releases them from the same height. Which object reaches the moon‘s surface first?
Note: Select the best choice given below according to your best of knowledge, and also write the reason of your selected choice as well.
a) The rock, because it‘s heavier and accelerate faster
b) The rock, because it has a greater force of gravity acting on it.
c) The stone, because there is less air frication acting on it.
d) They reach on the surface at the same time because their acceleration due to gravity is equal.
e) Both the rock and stone will just float there when released-there is no gravity on the moon.
Marks 3+4 = 7
Question. No: 4
A large 1.5Kg book rests on the surface of a rough table, and a horizontal force of 60N (to the right in the sketch shown above) is applied to it. If a frication force of 35Newtons opposes the motion of the book, determine the value of acceleration with which book will accelerate?
Marks 7
::::::::::::::::::::::::::: Wish you good luck::::::::::::::::::::::


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Replies to This Discussion

g hm na bhe aj he krwaii

HaSsAn

            Hum ne abhi tak nai karwari,,,, kindly help kardo HaSsAn Bhai

           

sometime hm sab log simple c cheez ko bohat difficult la jatay hain if hm log is question ko aram say concentration say daikhty to sab say easy ye he tha sab say pahaly to frictionless wheels hain jin ka floor k sath kuch concern he nai hai :)

hahahahahah

please any one let me know how to solve q1

Hahaha

Q1 mai sirf ek hi banda help kar sakta hai

Or wo hai hmara instructor sahib

Q2 Answer:

Net Force =  W - ma

              =  600N - 60kg x 5 m/s^2

              =  600N - 300N

              =  300N

can u let me know how u get acceleration due to gravity = 5 m/s2

which is already given 10 m/s2

any one please let me know about this thanks

Any help regarding question no.1? Any idea solution please share!

Q1 ka solution chahiye 

Hint for Q1:

There is no work done.

Prove it yourself; Best of luck.

kr lia hai prove :)

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