InterviewSolution
Saved Bookmarks
| 1. |
A particle of mass m moves with constant speed von a circular path of radius r as shown in figure. Theaverage force on it during its motion from A to B lsA-3.0€B13mv221trmv2(2)r213mv2(3)tr313mv2(4)4tr |
|
Answer» Answer: Themagnitudeofavgforce F av
isgivenby F av
= Δt Δp
v f
=vcosθ i +vsinθ(− j
) v i
=v j
Δp
= p f
− p i
=m v f
−m v i
=mvcosθ i +(−mvsinθ−mv) j
= 2 mv
i − 2 3mv
j
Δp
=mv 4 3
+ 4 9
=mv 3
Δt=( v 2πr
) 3 2
F av
= ( v 2πr
) 3 2
mv 3
= 4π 3 3
r mv 2
|
|