Recent content by Thegiver431

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    Law of universal gravitation (am I doing it wrong)

    I meant 1.5 x 10 ^11 (sorry)
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    Law of universal gravitation (am I doing it wrong)

    Homework Statement What is the gravitational force between Earth and the sun if the Earth has a mass of 5.98 x 10^24 and the sun has a mass of 1.99 x 10^30. The r is (1.5 x 10^11)^2[/B]Homework Equations F=(Gm1m2)/r^2 G= 6.67 x 10^-11 N m^2 /kg^2 ( note that this is a constant)[/B]The...
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    Coeffecient of train and the tracks?

    Thank you for everybody that answered, I get it now :)
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    Coeffecient of train and the tracks?

    Homework Statement What is the coefficient of friction between the train and the track, given that the train has 20,000 kg and is going at velocity of 26m/s. Note that when the train conductor saw a pedestrian he started braking and also the distance between the pedestrian to the train is 500m...
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    What Force Does Block B Exert on Block A?

    Homework Statement A hand pushes on block A. Block B is on the right side of block A. If block a has A mass of 20kg and block B has a mass of 12 kg, and the acceleration equals 4m/s^s, what is the force that block B exerts on Block A [/B]Homework Equations F=m/a [/B]The Attempt at a Solution...
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    Acceleration of a Truck with a Broken Chain: Finding the Resultant Force

    hmmm.. ok
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    Acceleration of a Truck with a Broken Chain: Finding the Resultant Force

    Yes but In general I don't get it, it would be helpful if i can have some help :)
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    Acceleration of a Truck with a Broken Chain: Finding the Resultant Force

    Homework Statement A 3000kg truck uses a chain to drag a 500kg log down a road at a constant speed of 10m/s. The friction between the ground and the log is 1000N. If the chain suddenly breaks, what is the acceleration of the truck?[/B]Homework Equations a=F/m[/B]The Attempt at a Solution I...
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    Angle Theta for Block 1 Sliding up an Incline

    Homework Statement What would angle theta have to be (in terms of m1,m2,theta,and g) for block 1 to slide up the incline with a constant...
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    High School Friction Force Calculation at an Angle on Flat Surface

    how do you find friction force when applied force is at an angle, this is on a flat horizontal surface.
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    How long can x m/s^2 reach a certain point?

    Thank You now I understand you got to convert acceleration to velocity in order to answer this example.:):):)
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    How long can x m/s^2 reach a certain point?

    For example if an object moves at 1.25 m/s^2, then how long will it take to move 15 meters?
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    Undergrad How Can Friction Force Be Measured and Compared Across Different Materials?

    Just a question i was curious about