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Question: Answered & Verified by Expert
A 0.5 kg block slides from A on horizontal track with an initial speed of 3 s1 towards a weightless horizontal spring of length m and force constant 2 m1. The part AB of the track is frictionless and the part BC has the coefficient of static and kinetic friction as 0.22 and 0.20 respectively. If the distance AB and BD are 2 m and 2.14 m respectively, the total distance through which the block moves before it comes to rest completely is -

PhysicsWork Power EnergyJEE Main
Options:
  • A 2.5 m
  • B 4.42 m
  • C 4.24 m
  • D 2.44 m
Solution:
1783 Upvotes Verified Answer
The correct answer is: 4.24 m
At D, 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 + μRmgxx2+x0.11=0

x=0.1 m

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

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