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PHYSICS (PHY101)
TOTAL MARKS: 25
Due Date: 24/11/2016
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Question. No: 1

a) Write your opinion on the following statement.
Is it true or wrong to say that “No acceleration means no forces are present”?
b) Is it true to say that “A projectile has zero acceleration at its peak”.
Either yes or explain with reason. Marks = 5 +5 =10

Question. No: 2

The coefficient of kinetic frication is 0.25. What is the magnitude of the tension force in the rope shown in the figure? Marks = 7

Question. No: 3

A student of Physics applies a constant force of 25Newtons while lifting a heavy Physics book up into the air a distance of 2.0meters. How much Work does the student do on the book?
1) 0joules, because gravity pulled down on the book
2) 5.0joules
3) 50 joules
4) The answer cannot be found without knowing the mass of the book.
5) The answer cannot be found without knowing the net Force on the book.
*Write the detail reason of your above selected choice as well. Marks = 4+4 =8

::::::::::::::::::::::::::: Wish you good luck::::::::::::::::::::::

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Replies to This Discussion

Answer 3:

3)50joules

Reason:
w=F.d
w=25N.2m
w=50Nm
w=50joules (-: Nm=joules)

plz help me to make me whole assignment

Q 2??

frndz plz help me uplod the assignment phy101?????????????????

• Normal force (N) = 1.6 kg × 9.8 (acceleration from gravity)
• Force from kinetic friction (Fr) = 0.25 × 1.6x9.8 Newtons
• Force from acceleration (Fa) = 1.6 × 2.2 = Newtons
• Total tension = Fr + Fa = 3.52 + 3.92 = 7.44 Newtons.

any body plzzz help to slove this assignment

jisko solution chahye inbox me

yeah inbox me ka button kehan hain

Hi I need the solution of this assignment can u please help.

Please Discuss here about this assignment.Thanks

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assignment phy 101 Solution By waqar ullah

Waqar ullah Bc150401184 
Question. No: 1

a) Write your opinion on the following statement. 
Is it true or wrong to say that “No acceleration means no forces are present”?
Yes it is true by formula 
F=ma
When 
a=0
Then
F=m (0)
F=0
b) Is it true to say that “A projectile e has zero acceleration at its peak”.
Either yes or explain with reason. 
In projectile motion the velocity has two components,
1. The horizontal component of velocity remains constant therefore the horizontal component of acceleration is zero during the whole journey therefore,
(a)x = 0.
2. The vertical component of velocity changes continuously and becomes zero at the summit point (peak point) but the vertical component has acceleration which is the acceleration due to gravity therefore,
(a)y = -g.
Question. No: 2

The coefficient of kinetic frication is 0.25. What is the magnitude of the tension force in the rope shown in the figure? Marks = 7

By formula 
F=µN
Here force of friction acting as a tension force
So
T=µma
=0.25×2.2×1.6
=0.88
Question. No: 3

A student of Physics applies a constant force of 25Newtons while lifting a heavy Physics book up into the air a distance of 2.0meters. How much Work does the student do on the book?
1) 0joules, because gravity pulled down on the book
2) 5.0joules
3) 50 joules
4) The answer cannot be found without knowing the mass of the book.
5) The answer cannot be found without knowing the net Force on the book
Option 4 is true because in the question mass is not mention by formula we know that 
W=P.E=mgh
Here g and h is mention but m is not mention



w=F.d
w=25.2
w=50Nm
w=50 joules..

And we not need mass baceuse force is given.

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