Recent content by flemj

would you do that my x sin theta ? im just really frustrated with this question

the height isn't given its just the length of the string sorry.

Homework Statement A 0.23kg pendulum bob is attached to a string 1.2 long at an angle of 30 degrees. What is the change in the gravitational potential energy of the system as the bob swings from point A to point B U= Homework Equations .5 mv^2 = mgl U=E+K The Attempt at a...

yes so while swimming my conservative energy would be 77.05 and in a nonconservative force I am losing some of that energy due to the friction and the heat that I am giving off etc. to solve for this equation do i need to find the distance i have swam ? i understand why it happened just now how...

sorry i wrote that down wrong but your saying i want to use W=Delta Ek ? how do i go about that tho? by using K=.5 mv^2?

Homework Statement Starting at rest at the edge of a swimming pool, a 67.0 athlete swims along the surface of the water and reaches a speed of 1.15 by doing the work = 171 . Find the nonconservative work, , done by the water on the athlete. Homework Equations (m)(a)(x initial) +...