Figure (8-E7) shows a spring fixed at the bottom end of an incline of inclination 37°. A small

Figure (8-E7) shows a spring fixed at the bottom end of
an incline of inclination 37°. A small block of mass 2 kg
starts slipping down the incline from a point 4.8 m away
from the spring. The block compresses the spring by
20 cm, stops momentarily and then rebounds through a
distance of 1 m up the incline. Find (a) the friction
coefficient between the plane and the block and (b) the
spring constant of the spring. Take g = 10 m/s 2
.
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[babyskillstv]

Sir plz reply apne 7:42 me spring ki potntkal nergy positive kyu le li?

[abhiadi]

Bro i have one doubt in 2nd case agar spring 1m rebound kiya tho usme elongation 0.8 hona chahiye na plz bro reply me confused totally

[shivanshsumitkumarsharma]

6:50 but sir gravity ne tu positive work kiya hai na

[anantika]

Sir elastic potential energy me negative and positive kaise lete hai

[aashutoshraj]

3:28, work done by spring is -negative potential energy ? But spring force to positive rehta hai n?