When a 2.50-kg object is hung vertically on a certain light spring described by Hooke's law,...

Question

Question

When a 2.50-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 2.38 cm.

(a) What is the force constant of the spring? _________N/m?

(b) How much work must an external agent do to stretch the same spring 7.60 cm from its unstretched position?_________J?

______________________________________________________________________________________________

A 620-kg elevator starts from rest and moves upward for 3.00 s with constant acceleration until it reaches its cruising speed, 1.63 m/s.

(b) How does this amount of power compare with its power during an upright trip with constant speed?

______W?

Answer 1

Answer #1

Answer 2

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