wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A ball after having fallen from rest under the influence of gravity for 6s, crashes through a horizontal glass plate, thereby losing two-third of its velocity. Then it reaches the ground in 2s, height of the plate above the ground is

A
19.6m
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
39.2m
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
58.8m
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
78.4m
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 58.8m
vB=vA+gt=0+g(6)=6g
Now, 23rd of the velocity is lost.
Hence, 13×6g=2g velocity is left.
h=ut+12gt=(2g)(2)+12g(2)2=6g=58.8 m

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Motion Under Constant Acceleration
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon