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

A force F=4^i5^j+3^k is acting at point r1=^i+2^j+3^k. The torque acting about the point r2=3^i2^j3^k is

A
Zero
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
42^i30^j+6^k
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
42^i+30^j+6^k
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
42^i+30^j6^k
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D 42^i+30^j6^k
F=4^i5^j+3^k
r1=^i+2^j+3^k
r2=3^i2^j3^k

r=r1r2=2^i+4j+6^k

torque, τ=F×r
τ=(4^i5^j+3^k) ×(2^i+4j+6^k)
τ=(12+30)^i+(24+6)^j+(1016)^k=(25^i+30^j6^k)

flag
Suggest Corrections
thumbs-up
20
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Torque: How Much Does a Force Turn?
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon