a single conservative force f(x) acts on a 1.0 kg particles that move along the x axis. the potential energy u(x) associated with f(x) is given by u(x)=-4xe^(-x/4) J, where x is in meters. at x=5.0 m, the particles has a kinetic energy of 2.0J. a) what is the mechanical energy of the system? determine the equation for fx as a function of xfor what x(finite)value of x does fx=0(adsbygoogle = window.adsbygoogle || []).push({});

Emech=K+U

I plugged x=5 into u(x) = -5.73

therefore Emech=2+(-5.73)=-3.73 J Is it right?

for the second one Fx= - du/dx so I come up with fx= (4-x)e^(-x/4)

and I stuck . COuld you guy give me a hint thank you

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Conservative force

**Physics Forums | Science Articles, Homework Help, Discussion**