0

Guest

Courses New

An elevator ascends from the ground with uniform speed. At time T1 a boy drops a marble through a hole in the floor. The marble hits the ground T2 seconds later. Find the height of the elevator at time T1.(T1=T2=4s)

An elevator ascends from the ground with uniform speed. At time T1 a boy drops a marble through a hole in the floor. The marble hits the ground T2 seconds later. Find the height of the elevator at time T1.(T1=T2=4s)

Grade:12th pass

2 Answers

downey zer
73 Points
6 years ago
Let the speed of the elevator be v
Then initially marble was also travelling at speed v.
when the marble fell from the hole the elevator was at height v*T1 as it was travelling at speed v for T1 time
now use 
h=ut+0.5at^2
where h = – v*T1
a= – g, u=v
t=T2
putting T1=T2=4
u will get v=10
so height =v*T1=40
downey zer
73 Points
6 years ago
please approve the answer if it helped

Think You Can Provide A Better Answer ?

Other Related Questions on Mechanics

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More