What minimum force requires for door to hold it open

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Reference no: EM134406

Question1

A professor's office door is 0.92 wide, 2.0high, and 4.0 thick; has a mass of 25 ; and pivots on frictionless hinges. A "door closer" is attached to door and the top of door frame. When the door is open and at rest, the door closer exerts a torque of 5.2. What is the minimum force that requires applying to the door to hold it open?

Question2

A 67-kg bungee jumper has fallen far sufficient that her bungee cord is beginning to stretch and resist her downward motion. Find out the force (magnitude and direction) exerted on her by bungee cord at an instant as her downward acceleration has a magnitude of 6.4 m/s2. Ignore the effects of air resistance. Acquire the upward direction as positive.

Reference no: EM134406

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