CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A boat's propeller has a rotational inertia of 4 kg-m2. After a constant torque is applied for 12 s, the propeller's angular speed changes from a clockwise 8 rad/s to counter-clock wise 8 rad/s. What was the torque applied to the propeller?

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

The correct option is B 5.3 N-m
We know that, torque,

τ=ΔLΔt=I(ωfωi)Δt

τ=4[8(8)]12=5.3 N-m

Hence, option (B) is the correct answer.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon