Physics: Post your doubts here!

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Sajeeda Akeel

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nehaoscar said:
Ok yeah taking the real case scenario it is clear
But then as you said "a 'centripetal' force is any force that acts towards the centre. since the mud is on an object in circular motion, it will experience a force."
Doesn't that mean the mud will experience a force towards the centre?
Click to expand...
No...Actually the centripetal force acting toward the centre is approximately at 90 degrees of an angle to the velocity in which the object is moving.
Hence, it does not have a component that is in the direction of the velocity of the object.
So, obviously neither the object nor the mud moves toward the centre. But, yes...you can definitely state that the mud and the object both experience a force toward the centre. If this force weren't there the, the object and mud would both move off in a straight line.
There would be no circular motion.
The action of the centripetal force that ACTS TOWARD THE CENTRE basically just bends the otherwise straight-line motion of the mud and object.
I HOPE I MADE IT A LITTLE CLEAR. o_O:whistle:
 
The Sarcastic Retard

The Sarcastic Retard

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Sajeeda Akeel said:
View attachment 57865

Could anyone explain how you deduce the answer...
Step by step!!!! :)
Click to expand...
3.8 x 10^5 will be the distance of the edge of moon to telescope (radius)
omega = 9.7 x 10^-6
When theta is so small the curvature = straight line.
We have to find Arc length which can be considered as a diameter as theta (omega) is so small.
So S = r x theta
Hence s = 3.8 x 10^5 x 9.7 x 10^-6 = 3700m
 
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http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w08_qp_2.pdf
question 4 part b
What else can I write except for...speed depends on pd and as pd is unchanged speed will remain same.

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w04_qp_2.pdf
question 6 part b

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s07_qp_2.pdf
question 2 part d
Can anybody make this simple?
Please and thanks!
 
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nehaoscar

nehaoscar

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Sajeeda Akeel said:
No...Actually the centripetal force acting toward the centre is approximately at 90 degrees of an angle to the velocity in which the object is moving.
Hence, it does not have a component that is in the direction of the velocity of the object.
So, obviously neither the object nor the mud moves toward the centre. But, yes...you can definitely state that the mud and the object both experience a force toward the centre. If this force weren't there the, the object and mud would both move off in a straight line.
There would be no circular motion.
The action of the centripetal force that ACTS TOWARD THE CENTRE basically just bends the otherwise straight-line motion of the mud and object.
I HOPE I MADE IT A LITTLE CLEAR. o_O:whistle:
Click to expand...
Okay yes thankyou so much! Now i get it! :D
 
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