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A box of mass m is pressed against (but is not attached to) an ideal spring of force constant k and negligible mass, compressing the spring a distance x. After it is released, the box slides up a frictionless incline as shown in the figure and eventually stops. If we repeat this experiment but instead use a spring having force constant 2k

A box of mass m is pressed against (but is not attached to) an ideal spring of force constant k and negligible mass, compressing the spring a distance x. After it is released, the box slides up a frictionless incline as shown in the figure and eventually stops. If we repeat this experiment but instead use a spring having force constant 2k

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Question 13 A box of massm is pressed against (but is not attached to) an ideal spring of force constant k and negligible mass, compressing the spring a distance x. After it is released, the box slides up a frictionless incline as shown in the figure and eventually stops. If we repeat this experiment but instead use a spring having force constant 2k Smooth TTT Smooth O tne block will go up the incline to half as high as before. O just as it moves free of the spring, the kinetic energy of the box will be twice as great as before. O the box will go up the incline twice as high as before. O none of the choices O just as it moves free of the spring, the speed of the box will be two times as great as before.
Transcribed Image Text:Question 13 A box of massm is pressed against (but is not attached to) an ideal spring of force constant k and negligible mass, compressing the spring a distance x. After it is released, the box slides up a frictionless incline as shown in the figure and eventually stops. If we repeat this experiment but instead use a spring having force constant 2k Smooth TTT Smooth O tne block will go up the incline to half as high as before. O just as it moves free of the spring, the kinetic energy of the box will be twice as great as before. O the box will go up the incline twice as high as before. O none of the choices O just as it moves free of the spring, the speed of the box will be two times as great as before.
Question 5 When you throw a pebble straight up with initial speed V, it reaches a maximum height H with no air resistance. At what speed should you throw it up vertically so it will go twice as high? None of the given choices O 2V O 8V O 4V
Transcribed Image Text:Question 5 When you throw a pebble straight up with initial speed V, it reaches a maximum height H with no air resistance. At what speed should you throw it up vertically so it will go twice as high? None of the given choices O 2V O 8V O 4V
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