Recent content by leighzer

So is this question about centripetal force and acceleration then?

Homework Statement A "seconds" pendulum is one that moves through its equilibrium position once each second (period = 2.000 s). The length of a seconds pendulum in Tokyo is 0.9927 m and at Cambridge is 0.9942 m. What is the ratio of the free-fall acceleration at these two locations...

The only thing I can think of for part (b) is that v(o) must be greater than or equal to: -*sqr rt*[ 2gRsin(theta) ] in order to keep the value inside the square root of the first equation positive.

A ball of mass m is spun in a vertical circle having radius R. The ball has a speed v(o) at its highest point. Take zero potential energy at the lowest point, and use the angle theta measured with respect to the vertical. (a) Derive an expression for the speed v at any time as a function of...

Ok, thanks for the help.

Right, but how do you figure out how much energy is lost due to friction? Is it something to do with Work?

So are you saying the energy at the top will equal the energy at the bottom of the ramp?

If I can find the speed of the block at the bottom of the inclined plane, I'll be able to work it out from there, but how do i find the speed when friction is present?

A block of mass 3.0 kg starts at a height 0.60 m on a plane that has an angle of 30 degrees from the horizontal. Upon reaching the bottom, the block slides along a horizontal surface. If the coefficient of friction on both surfaces is 0.20, how far does the block slide on the horizontal surface...

A particle of mass 0.500 kg is shot from point P, 60 m above the ground. The particle has an initial velocity Vi, with a horizontal component of 30.0 m/s. The particle rises to a maximum height of 20.0 m above P. Using the Law of Conservation of Energy, determine the vertical component of Vi.