# 107 - Kinematics Questions Answers

Two balls A and B are simultaneously released on two frictionless inclined planes from the position shown. The inclined planes have equal inclinations. The balls pass through a particular horizontal level 12s and 4s after they were released. How long after they were released will they be closest to each other?

**Asked By: MUDIT**

**submit your answer**

**Joshi sir comment**

Question in based on a figure, yet it is not provided.

Please update it for getting the solution.

Thanks

A projectile is fired with velocity u at entrance A of a horizontal tunnel of length L and height H. The minimum value of u for which projectile will reach the other end of the tunnel without touching the top of the tunnel is

**Asked By:**

**submit your answer**

**Joshi sir comment**

At t = 0, a stone is dropped into a well in which the level of water is h below the top of the well. If v is velocity of sound, the time T measured from t = 0, after which the splash is heard is given by ?

**Asked By: PREM**

**submit your answer**

**Joshi sir comment**

$Byh=ut+\frac{1}{2}a{t}^{2},timeofdownwardjourneycanbecalculated\phantom{\rule{0ex}{0ex}}thenh/visthetimeforupwardjourneyofsound\phantom{\rule{0ex}{0ex}}nowsolve$

Sir pls solve

**Asked By: KANDUKURI ASHISH**

**submit your answer**

**Joshi sir comment**

$Impulseis\overrightarrow{Ft}andPower=W/t\phantom{\rule{0ex}{0ex}}\overrightarrow{F}=m\overrightarrow{g}andW=mgh\phantom{\rule{0ex}{0ex}}Nowcalculatethetimeofmotion\phantom{\rule{0ex}{0ex}}andgettheanswer$

**Asked By: PRATEEK MOURYA**

**submit your answer**

**Joshi sir comment**

$Accordingtogivencondition\phantom{\rule{0ex}{0ex}}\frac{d\theta}{dt}=\frac{v\mathrm{sin}60}{a-(v+v\mathrm{cos}60)t}\phantom{\rule{0ex}{0ex}}Nowsolveitfort\phantom{\rule{0ex}{0ex}}thendis\mathrm{tan}ce=vt$solve

inform for any difficulty