Friday

August 22, 2014

August 22, 2014

Posted by **Zach** on Thursday, March 1, 2012 at 5:36pm.

is initially moving to the left with a speed of 3.77 m/s. The mass of m is 8.26 kg and the coefficients of friction are Us = 0.411 and Uk = 0.304. The string is massless and the pulley is

massless and frictionless. How fast will M be traveling when m has fallen through a height h = 2.47 meters?

W=change in E

This is what I have done:

1/2Mvf^2-1/2Mvi^2+1/2mvf^2-1/2mvi^2-mgh-UkMg=0

I then solved for for vf. The answer is suppose to be 4.62 but I am way off. I need help fixing my set up.

**Related Questions**

Physics - A block of mass m1 = 2.4 kg initially moving to the right with a speed...

Physics - A block of mass m1 = 2.4 kg initially moving to the right with a speed...

physics - Two blocks move along a linear path on a nearly frictionless air track...

Physics - Two blocks move along a linear path on a nearly frictionless air track...

physics - A block of mass m1 = 2.4 kg initially moving to the right with a speed...

Physics - Two blocks move along a linear path on a nearly frictionless air ...

Physics - A block of mass m1=1.6kg, initially moving to the right with a ...

physics - A block of mass 35 kg moves on the horizontal surface. If initially at...

physics - block a in figure 1 has a mass of 10kg, and block b has a mass of 30 ...

physics - A bullet with mass m = 5.21 g is moving horizontally with a speed v=...