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

A rocket is fired upward from the earth's surface such that it creates an acceleration of 19.6 m/sec2. If after 5 sec its engine is switched off, the maximum height of the rocket from earth's surface would be

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

The correct option is D 735 m

Given a=19.6m/s2=2g
Resultant velocity of the rocket after 5sec
v=2g×5=10g m/s
Height acheived at 5 sec.h1=12×2g×25=245m
On switching off the engine it goes up to height h2 where its velocity
becomes zero.
0=(10g)22gh2h2490m
Total height of rocket =245+490=735 m


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Human Cannonball
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon