Find spring constant if negligible mass supported by spring
A 60-kg person drops from rest a distance of 1.20 m to a platform of negligible mass supported by a stiff spring. The platform drops 6 cm before the person comes to rest. What is the spring constant of the spring?
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A uniform electric field of magnitude 375 N/C pointing in the positive x-direction acts on an electron, whichis initially at rest. After the electron has moved 3.20 cm, what is (a) the work done by the field on hte electron, (b) the change in pote
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The backward direction relative to the centre of mass and the other has the velocity of 0.500c in the forward direction. what velocities will the observer find?
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