wiz-icon
MyQuestionIcon
MyQuestionIcon
11
You visited us 11 times! Enjoying our articles? Unlock Full Access!
Question

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

A
t3=12(t1+t2)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
t3=t1t2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
1t3=1t21t1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
t23=t21t22
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B t3=t1t2
Applying equations of motion for all three cases
h=ut112gt21...(1)
h=ut212gt22...(2)
&h=12gt23...(3)
Multiply equation 1 with t2 and equation 2 with t1 and add them
We get,
h=12gt1t2.......(4)
Now by (3) & (4)
t23=t1t2
t3=t1t2

flag
Suggest Corrections
thumbs-up
71
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Motion Under Gravity
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon