Recent content by Oliviam12

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    Undergrad Minimum Colors for an Icosahedron

    How could you mathematically solve for the minimum amount of colors needed for each face of an icosahedron or any regular polyhedron to not touch? (E.g. a tetrahedron pyramid would need four unique colors.)
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    What is the orbital speed of a satellite in geostationary orbit?

    Homework Statement What is the orbital speed of a satellite of mass 490 kg in geostationary orbit? Homework Equations Fg= G m1m2/r The Attempt at a Solution I don't really know where to begin... I know the period is 24 hours because it is geostationary, and the height is 35880...
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    How Small Can the Track's Radius Be for Safe Train Speeds?

    Homework Statement A train has a speed of v = 66.5 km/h. If the acceleration experienced by the passengers is to be less than 0.35 g, (g = 9.81 m/s2), find the smallest radius of curvature R acceptable for the track. Homework Equations A=v^2/r a=(mv^2)/r The Attempt at a Solution...
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    Is a Bouncing Ball an Example of an Elastic Collision?

    Homework Statement What is an example of an elastic equation on earth? Homework Equations N/A The Attempt at a Solution Is a ball bouncing on the ground a good example of an elastic collision? (If it is)
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    Calculating Initial Speed in an Inelastic Collision with Friction

    I am sorry but, I don't understand this problem at all... Can you redirect me to an example problem or a tutorial?
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    Calculating Initial Speed in an Inelastic Collision with Friction

    Energy is conserved, but I don't know how to find the speed of the two cars after the collision :/
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    Calculating Initial Speed in an Inelastic Collision with Friction

    Homework Statement A drunk driver strikes a parked car. During the collision the cars become entangled and slide to a stop together. The drunk driver's car has a total mass of 742 kg, and the parked car has a total mass of 776 kg. If the cars slide 18 m before coming to rest, how fast was the...
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    Calculating Speed in an Elastic Bumper Car Collision

    Ok! Thanks I got it now
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    Calculating Speed in an Elastic Bumper Car Collision

    I don't see what you mean? The variables are Walts total mass= 128 Kg. Wolfie total mass= 111 kg Walts velocity= 3.7 m/s and Walts end speed is .26555 m/s...
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    Calculating Speed in an Elastic Bumper Car Collision

    err? I got that it was elastic..?
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    Calculating Speed in an Elastic Bumper Car Collision

    Homework Statement Walt and Wolfie collide in bumper cars of mass 50 kg each. Walt has a mass of 78 kg, and Wolfie has a mass of 61 kg. Walt strikes Wolfie from the rear at V = 3.7 m/s. If the collision is elastic, Wolfie is initially at rest, and Walt's final speed is 0.2655 m/s in the same...
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    Solve Spring Gun Question Homework

    Thanks! That tip kind of caused an epiphany and I got it now.
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    Solve Spring Gun Question Homework

    Homework Statement A spring-loaded toy dart gun fires darts with a mass of 104 g. When the spring in the dart gun is compressed 8 cm, the dart flies off with a speed of 11.4 m/s. What is the spring constant of the spring in the dart gun?Homework Equations W=1/2*k*x^2 V=sqrt(2W/m) The Attempt...
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    Non-conservaite force and Kinetic Energy

    Never mind, I just happened upon it online. Thanks anyway!
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    Calculating Work Done on Crate by Truck

    Homework Statement A truck carrying a 37 kg crate accelerates uniformly from rest to 77.5 km/hr in 12.2 s. Calculate the work done on the crate by the truck. Homework Equations W=Fcos\theta\DeltaD The Attempt at a Solution I first changed 77.5 km/hr to 21.257 m/s. Then I...