From a building,two balls A and B are thrown | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Using the third equation of motion: $v^2 = u^2 + 2gh$,where $u$ is the initial speed,$g$ is the acceleration due to gravity,and $h$ is the height

Vedclass · Accepted Answer

$v_{A} = v_{B}$

Vedclass · Answer

(C) Using the third equation of motion: $v^2 = u^2 + 2gh$,where $u$ is the initial speed,$g$ is the acceleration due to gravity,and $h$ is the height of the building.For ball $A$ thrown upwards: The initial velocity is $u$ upwards. It will rise to a certain height and then fall back to the ground level. When it passes the point of projection on its way down,its speed will be $u$ downwards. Thus,it reaches the ground with a speed $v_A = \sqrt{u^2 + 2gh}$.For ball $B$ thrown downwards: The initial velocity is $u$ downwards. It reaches the ground with a speed $v_B = \sqrt{u^2 + 2gh}$.Since both $u$,$g$,and $h$ are the same for both balls,we have $v_A = v_B$.

From a building,two balls $A$ and $B$ are thrown such that $A$ is thrown upwards and $B$ is thrown downwards with the same speed $u$ (both vertically). If $v_{A}$ and $v_{B}$ are their respective velocities on reaching the ground,then:

Similar Questions

$A$ football is kicked into the air vertically upwards. What is its $(a)$ acceleration and $(b)$ velocity at the highest point?

$A$ parachutist after bailing out falls $50\, m$ without friction. When the parachute opens,it decelerates at $2\, m/s^2$. He reaches the ground with a speed of $3\, m/s$. At what height did he bail out (in $, m$)?

$A$ ball is thrown vertically upward with an initial velocity of $150\,m/s$. The ratio of velocity after $3\,s$ and $5\,s$ is $\frac{x+1}{x}$. The value of $x$ is $...........$ Take $g=10\,m/s^2$.

$A$ stone is dropped from the top of a building. When it crosses a point $5 \, m$ below the top,another stone starts to fall from a point $25 \, m$ below the top. Both stones reach the bottom of the building simultaneously. The height of the building is ..... $m$.

$A$ ball is thrown vertically upwards with a speed of $10 \ m/s$ from the top of a tower $200 \ m$ high and another is thrown vertically downwards with the same speed simultaneously. The time difference between them in reaching the ground (in $s$) is: $(g = 10 \ m/s^2)$

Vedclass Test Series

Exam Paper Generator

Online Exam Module