How Do You Solve These Basic A/L Physics Problems?

[Nufi]

01.Velocity V of a stretched string depends on Tension T and mass per unit length M of the string. Create an equation for Velocity VUsing dimensional analysis.

02. A balloon is moving upward with velocity 36km/h, when it is 40m height from ground a particle dropped from it. (g=10m/s and there is no air friction) find,
a.Maximum height reached by the particle from ground
b.Time taken to the particle to reached the ground,
c.Velocity of the particle just before reach the ground.

03.A particle dropped from vertically downward from the top of the building, find the displacement of the nth second, 1st, 2nd, 3rd and 4thseconds.

04. P + ½ ρ v2 = constant, where P- pressure, ρ- Density, v- velocity. Show that the equation is dimensionally correct.
(Its v x v not v2)

 

[PeterDonis]

@Nufi you need to use the homework template for your question: give the equations that you think are applicable, and show your own attempt at a solution.

 

[scottdave]

Two of these are basic dimensional analysis. Do you know how that works? Do you know what dimensions of Tension are? What about Pressure, Velocity, Density ? For the others, search for SUVAT or look at one of these: http://hyperphysics.phy-astr.gsu.edu/hbase/acons.html and https://en.wikipedia.org/wiki/Equations_of_motion

 

[Nufi]

Well, I got the answers. Anway Thx.

 

[scottdave]

Well, I got the answers. Anway Thx.

Great. The way PhysicsForums works is to provide guidance in figuring out a problem (especially with schoolwork type problems). You won't find an answer or solution just handed out.