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A2 physics

Help!!!!! Don’t understand why the level is 1/4 of original value the displacement previously is 40mm now x=25mm. I understand is decrease as velocity decrease due to smaller displacement but I don’t understand why me decrease by 1/4.
Screenshot 2021-02-15 at 10.34.53 AM.jpg198.2KB
Kinetic energy is equal to 1/2mv^2

Since the velocity decreased by a factor of 2, the kinetic energy is reduced by a factor of 2 squared. (Kinetic energy is proportional to velocity squared)
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Danyal124
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Original post by wizkid44
Kinetic energy is equal to 1/2mv^2

energy is proportional to velocity squared)

Since the velocity decreased by a factor of 2, the kinetic energy is reduced by a factor of 2 squared. (Kas velocity decraese with amplitude it was relased from the aplitude went from 40 to 25mm ie hasnt halved why are we saying the velocity has turnt 2x smaller hence ke is 4x smaller
Original post by Danyal124
Since the velocity decreased by a factor of 2, the kinetic energy is reduced by a factor of 2 squared. (Kas velocity decraese with amplitude it was relased from the aplitude went from 40 to 25mm ie hasnt halved why are we saying the velocity has turnt 2x smaller hence ke is 4x smaller


Yeah exactly

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