Recent content by gonzalo12345

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...

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...

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...

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...

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...

I got it, I got c=1 thanks

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...

ok thanks, so I got 2.2 m/s2 for the acceleration

f = m N N=-W => 0.40(392N) = 156.8N

thanks, but how did you got 110? I recalclated and had 156.8

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?

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...

so for d can I use the distance formula?

edit

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...