Top of a tower a stone, Physics

From top of a tower a stone is thrown up and it reaches the ground in time t1. A second stone is thrown down with the same speed and it reaches the ground in t2. A third stone is released from rest and it reaches the ground in time t3 then t3= ?

solution)

let the intial speed be ''u'' and height be ''h''.

h(-j)=u(j)*t1+0.5g(-j)*t12

Case(2)

h(-j)=u(-j)*t2+0.5g(-j)*t22

Case(3)

h(-j)=0.5g(-j)*t32

 

solve case 1 and case 2 for t1 and t2 (quadratic) .

 

Posted Date: 3/26/2013 12:57:50 AM | Location : United States





its very easy quest. we just need to find the values in u,g,and v(final velocity,this is constant for the first two cases)

for first throw.

t1= 2u/g + v-u/g=v+u/g

for second throw.

t2=v-u/g

for third release.

t3=u/g

so t3=(t1-t2)/2g

 

Posted by | Posted Date: 3/26/2013 12:58:51 AM


Related Discussions:- Top of a tower a stone, Assignment Help, Ask Question on Top of a tower a stone, Get Answer, Expert's Help, Top of a tower a stone Discussions

Write discussion on Top of a tower a stone
Your posts are moderated
Related Questions
A boy throws a ball of mass 20 kg vertically upwards.It raises to a maximum height of 100 m.At what height will the kinetic energy be reduced to 70%?

Explain the Electric Forces and Fields This can be thought of in terms of an electric field, E, similar to the gravitational field discussed earlier [Fg = m g( r ) where at the


LENARD ATOMIC MODEL : Lenard  suggested that the atom must have a lot of empty  in it. Lenard's model of an atom could not explain about the stability and mass of an atom .

Kinematic chain related to an assembly of rigid bodies connected by joints that is the mathematical model for a mechanical system. As in the familiar use of the word chain, the rig

One of the Maxwell's e-m equations involves the curl of the electric field. Write down the equation and mention the law of electromagnetism which is shown by the equation.

When Temperature increases,intensity increases,but in some time intensity decreases,Why?

Explain the basic characteristics of grating spectra?

What are the disadvantages of polymer fibers optics? The ends of polymer fibers can't operate along with high temperatures. Illuminators or light sources are required with a sc