Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
A particle of mass m, initial speed u and angle of projection θ, is projected as shown in the figure. Average torque on the projectile between initial and final positions P and Q about the point of projection is 
 
PhysicsMotion In Two DimensionsNEET
Options:
  • A mu2sin2θ2
  • B mu2cosθ
  • C mu2sinθ
  • D mu2cosθ2
Solution:
1380 Upvotes Verified Answer
The correct answer is: mu2sin2θ2
           ταv×ΔtL                                                ...(1)

Here, Δt = time of flight = 2usinθg

      ΔL=Lf-Li about the point of projection.

              =musinθrange-0

              =musinθu2sin2θg

∴   τav=ΔLΔt=mu3sinθsin2θgg2usinθ

              =mu2sin2θ2

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.