Spring-pushed mass sliding over a rough patch on an otherwise smooth surface
Автор: physgins
Загружено: 2024-07-18
Просмотров: 22
A nice Physics 1 homework problem that helps solidify an understanding of both energy conservation and work
Problem:
A mass m = 12 kg rests on a frictionless table and accelerated by a spring with spring constant k = 4591
N/m. The floor is frictionless except for a rough patch. For this rough path, the coefficient of friction is
μk = 0.48. The mass leaves the spring at a speed v = 3.8 m/s
1)How much work is done by the spring as it accelerates the mass?
2)How far was the spring stretched from its unstretched length?
3)The mass is measured to leave the rough spot with a final speed vf = 2.2 m/s.How much work is done by friction as the mass crosses the rough spot?
4)What is the length of the rough spot
5)In a new scenario, the block only makes it (exactly) half-way through the rough spot. How far was the spring compressed from its unstretched length?
6)In this new scenario, what would the coefficient of friction of the rough patch need to be changed to in order for the block to just barely make it through the rough patch?
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