Recent content by gonzalo12345

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    Pivoting Cylinder Homework: Find Angular Acceleration

    Homework Statement M, a solid cylinder (M=1.63 kg, R=0.119 m) pivots on a thin, fixed, frictionless bearing. A string wrapped around the cylinder with a mass m = 0.830 kg is hung from the string, find the angular acceleration of the cylinder...
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    Vibration Platform: Find Frequency for Rock Clatter

    Homework Statement A vibration platform oscillates up and down with an amplitude of 10.4 cm at a controlled variable frequency. Suppose a small rock of unknown mass is placed on the platform. At what frequency will the rock just begin to leave the surface so that it starts to clatter...
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    Calculating Geosynchronous Orbit for a Satellite Around Jupiter's Moon

    Homework Statement 1. One of Jupiter's moons has a mass of 4.80E+23 kg and a radius of 3000.0 km. How high above the surface of the moon should a satellite of mass 183.0 kg be so that it undergoes geosynchronous orbit about the moon? The rotational period of the moon is 0.2639 days. 2...
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    What is the Required Centripetal Acceleration for a Stone to Reach 25 Meters?

    Homework Statement You plan to throw stones by using a sling of length 1.3 m which you whirl over your head. Suppose you wish to throw a stone a distance of 25 m. What must be the centripetal acceleration of the stone just before its release if it is to reach this distance? Assume that the...
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    Van de Graaff field potential energy and capacitor bulb problem

    Homework Help! please Homework Statement Two problems: 1. A Van de Graff machine has an electric field of 2000 N/C at a distance of .3 meters. What electrostatic potential energy would a proton have there? 2. How long would a 3 Farad capacitor light a 60 Watt bulb? Homework...
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    Consider the differential equation dy/dx = (y-1)^2 cos(Πx)

    I got it, I got c=1 thanks
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    Consider the differential equation dy/dx = (y-1)^2 cos(Πx)

    HW help! Homework Statement consider the differential equation dy/dx = (y-1)^2 cos(Πx) a.There is a horizontal line with y =c that satisfies this equation. Find the value of c b. Find the particular solution y =f(x) tot the differential equation with the initial condition f(1) = 0...
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    Solving for Car's Acceleration: 40kg, 30° Angle, 0.4 μ

    ok thanks, so I got 2.2 m/s2 for the acceleration
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    Solving for Car's Acceleration: 40kg, 30° Angle, 0.4 μ

    f = m N N=-W => 0.40(392N) = 156.8N
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    Solving for Car's Acceleration: 40kg, 30° Angle, 0.4 μ

    thanks, but how did you got 110? I recalclated and had 156.8
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    Solving for Car's Acceleration: 40kg, 30° Angle, 0.4 μ

    thats right, the new value for friction is 156.8, but I still don't understand how to add all the forces. I have friction, the horizontal and vertical components of the force applied, what else do I add?
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    Solving for Car's Acceleration: 40kg, 30° Angle, 0.4 μ

    Homework Statement a person pulls a 40kg car at a 30 degree angle with 230N. If the coefficient of friction is 0.40, with what acceleration does the car move? Homework Equations F =ma f = mN The Attempt at a Solution I draw a FBD then I found F sin θ which is 115, and F...
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    Solving Particle Motion Along y-Axis Problem

    so for d can I use the distance formula?
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    Solving Particle Motion Along y-Axis Problem

    edit
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    Solving Particle Motion Along y-Axis Problem

    Homework Statement A particle moves along the y-axis with position defined by y(t) = -1/2cos(t^2) + 7/2 t≥ 0 a. find(2) b. in which direction is the particle moving at time t=1.5? c. find the acceleration of the particle at time t=1.5 Is the velocity of the particle increasing at t=1.5...
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