1) A 15 cm long spring is attached to the ceiling. When a 2.2 kg mass is hung from it, the spring stretches to a length of 20 cm.(a) What is the spring constant k?(b) How long is the spring when a 3.0 kg mass is suspended from it?2) To tighten a bolt, you push with a force of 100 N at the end of a wrench handle that is 0.25 m from the axis of the bolt.(a) What torque are you exerting?(b) If you move your hand inward to be only 0.15 m from the bolt, what force do you have to exert to achieve the same torque?
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