Recent content by tutojean

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    Solving problems usng conservation of energy

    Homework Statement A block of mass 1.5 kg is placed against a horizontal spring of force constant k that is compressed .20 m. the spring is then released and the block travels to the right along a horizontal surface. The coefficient of kinetic friction between the block and the surface is 0.4...
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    How Does the Conservation of Energy Principle Apply to a Gymnast's Swing?

    Homework Statement Example: A 50 kg gymnast does giant circles around a horizontal bar. At the top of her swing her center of mass is 1.0 m above the bar traveling 1.2 m/s. what is the speed of her center of mass at the bottom of her swing where her center at mass is 1.0 m below the bar? (...
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    Finding force to accerate with given speed and time

    Homework Statement An automobile of mass 1000 kg is traveling 10 m/s. What force is necessary to accelerate it to 50 m/s in 8 sec? Homework Equations Used Sigma(F) = (m)(a) Sigma F = force m = mass a = acceleration The Attempt at a Solution F = ma Sigma F =...
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    Minimum Force for Moving a Sled on a Horizontal Surface

    I assume 12.8 N
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    Minimum Force for Moving a Sled on a Horizontal Surface

    Homework Statement A sled is pulled over a horizontal surface where the kinetic coefficient of friction is .20. What is the minimum force necessary to keep the sled moving if its mass is 2 slugs? Homework Equations fs = Ns(mg) The Attempt at a Solution fs = (.20) (2 slugs) (32)...
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    Frictional Forces and Coefficients of Friction [Need help]

    Homework Statement A sled is pulled at a constant speed over a horizontal surface where the kinetic coefficient of friction is .20. What is the minimum force necessary to keep the sled moving if its mass is 2 slugs? Homework Equations f(s)=U(s)N or f(s)=Ns(mg) F(s)= Frictional Force...