Recent content by scavok

Homework Statement A gas within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processes: Process 1-2: Constant volume, V_1=0.028m^3, U_2-U_1=26.4kJ Process 2-3: Expansion with pV=constant, U_3=U_2 Process 3-1: Constant pressure, p_2=1.4 bar, W_{31}=-10.5kJ...

http://home.comcast.net/~andykovacs/integral.JPG I had to reverse a double integral and evaluate, and I was able to do the reversal, but I was stumped on how to integrate this. I imagine there's a way to simplify it since I can't see how any of the integration techniques I've learned will...

f_s=\mu mg Is that what you're talking about? Or is there a way to actually solve for f_s? Sorry I don't understand what you're talking about with the moments.

I don't have the answer. I've set the point where the ladder hits the floor as the pivot. I've thought about this a little more, but I'm still having trouble. This is when nobody is on the ladder: F_1(sin\theta L)-w(\frac{cos\theta L}{2})=0 When the person gets on the ladder, the first...

A uniform ladder of length 9 m leans against a frictionless vertical wall making an angle of 47° with the ground. The coefficient of static friction between the ladder and the ground is 0.41. If your mass is 74 kg and the ladder's mass is 33 kg, how far up the ladder can you climb before it...

A hollow, thin-walled cylinder and a solid sphere start from rest and roll without slipping down an inclined plane of length 5 m. The cylinder arrives at the bottom of the plane 2.9 s after the sphere. Determine the angle between the inclined plane and the horizontal. Ok, I think I'm close...

Do you get y=-11.2432 and y=-1.0611 after solving the quadratic equation? If so then I probably screwed up with the physics.

http://home.comcast.net/~andykovacs/equation.GIF g is a constant. I need to find theta. Is there some trick I can do to cancel out the denominator in the root?

Wouldn't I need the angular velocity, velocity, or time to do anything with that?

In 1993, a giant yo-yo of mass 480 kg and measuring about 1.9 m in radius was dropped from a crane 57 m high. Assuming that the axle of the yo-yo had a radius of r=0.1 m, find the velocity of the descent v at the end of the fall. I know that .5mv2+.5Iw2=mgh, but I don't have a clue how to...

https://chip.physics.purdue.edu/protected/Halliday6Mimg/h10p33.jpg A block of mass m1 = 2.5 kg slides along a frictionless table with a speed of 12 m/s. Directly in front of it, and moving in the same direction, is a block of mass m2 = 6.2 kg moving at 3.7 m/s. A massless spring with spring...

Just a bump. I finished all my other problems, but I still can't picture what I need to do for this.

Sorry, I still don't have a clue.

A 2.8 kg block is dropped from a height of 5.8 m (above the top of the spring) onto a spring of spring constant 3955 N/m. Find the speed of the block when the compression of the spring is 15.0 cm. x=0.15m k=3955N/m m=2.8kg Einitial mech=Efinal mech Usi+Ugi+Ki=Usf+Ugf+Kf Usi=0...

Sigh, I got it. I was dividing the 59.2 N/cm by 100 instead of multiplying. Sorry about that. As an aside, how do you make those equation images? Are you using excel, or is there something more convenient?