A cylindrical wire is placed over a frictionless pulley with one end of a wire connected to a 5.8 kg mass and the other to a 1.5 kg mass. If g=9.8 m/s/s, what is the tension in the wire?
I have no idea how to start on this.
Okay... i equated .5kx^2 and .5mv^2 for the block, and got the velocity, v. Then i used mv=MV (conservation of momentum) to find the final velocity of the bullet as it emerges out of the block. But that is not the correct answer.
Help me.
astronuc
thanks astronuc, but that did not help. i was talking about the "central force", not "centripetal" and again, the mass of the particle is not given, so i can't use the mass.
In the Bohr model of the hydrogen atom,
the speed of the electron is approximately
1.96e+6 m/s.
Find the central force acting on the electron
as it revolves in a circular orbit of radius
4.8e-11 m. Answer in units of N.