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Physics: Post your doubts here!

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Can anyone assist me with this question: A marble rolls off a table 4m high at a speed of 10m/s
a) How far from the edge of the table does it strike the floor?
b) What is it's velocity(magnitude and direction) as it strikes the floor?
 
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Maganius ^_^ here! ive uploaded it :)
these were on my database nt made by me though :) hope its useful bro ^_^
 

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  • A Level Physics Equations and Definitions.pdf
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  • AS Revision Notes – Electricity And Thermal Physics.pdf
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  • Physics A Level formula sheet 1 (Detailed).pdf
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  • Physics A Level formula sheet 2.pdf
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  • Physics Summarised Notes.pdf
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These are compiled questions by my teacher given to me
I hope that you spread this to other forums also to people wanting to do well in Paper 4
Thanks!
Light, Love and Luck to you xtreme-excelsiors ! :)
 

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  • 9702_electromagnetism_all_completed_upto_May_June_2012.pdf
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  • 9702_gravitation_all_completed_upto_May_June_2012.pdf
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  • 9702_capacitors_all_completed_upto_May_June_2012.pdf
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A rocket of mass M is travelling at a constant speed v away from a stationary observer when it instantaneously ejects one-third of its mass at a speed of 6v towards the observer. What is the new speed of the rocket?

A. 1.5 v
B. 2.0v
C. 4.5v
D. 5.0v

could someone explain how its done... the answer is 4.5v
 
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q10
why will the velocity stay the same at Y even though the mass of the truck is decreasing?
 

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