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A single mass m1 = 4.2 kg hangs from a spring in a motionless elevator. The spring is extended x = 13.0 cm from its unstretched length.
Now the elevator is moving downward with a velocity of v = -3.0 m/s but accelerating upward with an acceleration of a = 4.5 m/s2. (Note: an upward acceleration when the elevator is moving down means the elevator is slowing down.)
What is the force the bottom spring exerts on the bottom mass?
What is the distance the upper spring is extended from its unstretched length?
What is the distance the MIDDLE spring is extended from its unstretched length?
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While looking into a silver Christmas ornament, If your nose is only 6.25 inches from the ornament, and the diameter of the ornament is 4.85 cm, how far behind the ornament does your nose appear
In a grocery store, a convex mirror with R= 4.0 m is used for surveillance. Suppose a person of height 1.7 m is 12 m from such a mirror. What is the size of the image
You heat a 585 cm3 sample of a substance from 129°C to 283°C, Calculate the coefficient of volume expansion of this substance
Two Skaters collide and hold on to each other on a frictionless floor. find direction of the velocity of these skaters after the collision
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