Recent content by brnnpink4

The hill is .5m high

Homework Statement a .4 kg mass compresses a spring of .2m. The spring constant is 400n/m How fast is the mass moving after the mass is released and the spring uncompresses? If the mass is going up a .5m hill, how fast is it going? Homework Equations PE+KE=w PE=mgh KE=.5mv^2...

Homework Statement An escalator at a mall lifts passengers 6m. The escalator has to be able to lift 50-75kg people at one time up the lift. The time to make it to the top is 40s. What must the power rating of the escalator be? Homework Equations w=fd p=w/t The Attempt at a Solution w=6f

How would you go about solving xf and xi?

Homework Statement A 50Kg box is pulled across the ground with a force of 250 N. The speed of the box is a constant 4m/s for 3 seconds. Friction is NOT 0. a) What is the net work done on the box by all forces ? b) How much work is done on the box by applied forces? c) What is the work...

Homework Statement A pinball machine has a spring that loads up, and shoots a small ball up a shallow incline. The mass of the pinball is .05kg. The incline for the pinball is 15 degrees. Assume no friction exists along the distance over which the spring applies its force. The coefficient...

Ok I think I got it! Thank You!

So would you set kinetic energy and potential energy equal to each other and solve for v?

How would you figure out what energy is gained/lost??

Homework Statement Tarzan swings across a valley on a vine. The vine is 6m in length. Tarzan has a mass of 85kg. The angle that the vine makes with the vertical in his initial position is 15 degrees. What is his speed at the bottom of the wing? What is the tension of the vine at this point...