Recent content by lo31415926535

  1. L

    Moment of inertia rolling down a hill

    that's what it was on your second example… What math am I supposed to do??
  2. L

    Moment of inertia rolling down a hill

    okay so since the masses and radii drop out, they reach the bottom at the same time?
  3. L

    Designing a Car for Coasting Race: Wheels

    they reach the bottom at the same time?
  4. L

    Designing a Car for Coasting Race: Wheels

    okay so FN=mgcosθ and ma=mgsinθ
  5. L

    Designing a Car for Coasting Race: Wheels

    hmm the one with the small inertia?
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    Designing a Car for Coasting Race: Wheels

    Well a lower moment of inertia would mean less resistance to motion right? so it would move more quickly? and yes this is related to the other question… Am I approaching it right by using moment of inertia?
  7. L

    Moment of inertia rolling down a hill

    Just gravity is acting on them right? So the larger, more massive one would reach the bottom first?
  8. L

    Moment of inertia rolling down a hill

    What physics do I have to do? My teacher talked about it a little… but honestly he is not very good at explaining things so I am having trouble understanding this.
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    Moment of inertia rolling down a hill

    Homework Statement Two solid spheres -- a large, massive sphere and a small sphere with low mass -- are rolled down a hill. Which one reaches the bottom of the hill first? Homework Equations ICM= (2/5)MR2 The Attempt at a Solution I thought that this would be the smaller sphere...
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    Designing a Car for Coasting Race: Wheels

    Homework Statement Suppose you are designing a car for a coasting race -- the cars in this race have no engines, they simply coast down a hill. Do you want large wheels or small wheels? Do you want solid, disk-like wheels, or hoop-like wheels? Should be wheels be heavy or light? (Select all...
  11. L

    What Are the Energy Transformations in a Car-Truck Collision?

    thank you both! i got it :)
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    What Are the Energy Transformations in a Car-Truck Collision?

    Homework Statement A 1110 kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9900 kg truck moving in the same direction at 20.0 m/s (Fig. P9.21). The velocity of the car right after the collision is 18.0 m/s to the east. image...
  13. L

    Potential energy and conservation

    Oops that was the problem! I typed it in wrong when i was making my calculations. Thanks so much
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    Potential energy and conservation

    Homework Statement A 10.0 kg block is released from point A in Figure P8.57. The track is frictionless except for the portion BC, with a length of 6.00 m. The block travels down the track, hits a spring of force constant k = 2250 N/m, and compresses it 0.300 m from its equilibrium position...
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    How Fast Can a Truck Turn Without Losing Its Cargo?

    Thank you very much Jakeus314! It's been a while since I've done circular motion