Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.MiscellaneousEasy2 minPYQ_2020
PhysicsEasysingle choice

A0.5 kgblock slides fromAon horizontal track with an initial speed of3 m s–1towards a weightless horizontal spring of length1 mand force constant2 N m–1. The partABof the track is frictionless and the partBChas the coefficient of static and kinetic friction as0.22and0.20respectively. If the distanceABandBDare2 mand2.14m respectively, the total distance through which the block moves before it comes to rest completely is -

Options:

Answer:
C
Solution:

AtD,KE=12 mv2 – μkmg BD

= 12 × 0.5 × 32 – 0.2 × 0.5 × 10 × 2.14

= 2.25 – 2.14=0.11 J

0.11=12 kx2 + μRmg x⇒x2 + x – 0.11=0

⇒x=0.1 m

Total distance covered=2 + 2.14 + 0.1 =4.24 m

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:W.E.P.Subtopic:Miscellaneous
⏱ 2mℹ️ Source: PYQ_2020

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