Recent content by jinman

Hrmmm. I thought it would be Harder. Thank you!

Homework Statement i hit a golf ball of mass 0.045kg with an avg. Force of 2.5x10^3 N over a short time interval of 1.0 x 10^-3 s at an angle of 30 degrees with respect to the horizontal. neglect air resistance and assume a level course. What is the speed of the ball immediately after...

thanks!

I used 55m because D=110m is the the whole system, so i looked at the first half. which is why i used 44.4 seconds. Is this the right to do the problem?

[SOLVED] Pascal's Principle help. Homework Statement A piston of cross-sectional area a is used in a hydraulic press to exert a small force magnitude f on the enclosed liquid. A connecting pipe leads to a larger piston of cross-sectional area A. 1. What force magnitude F(2) will the...

Homework Statement An old two pipe system runs through a hill, with distances D_a=D_b=30m and the total Distance is D=110m. On each side of the hill, the pipe radius is .0200m. However, the radius of the pipe inside the hill is no longer known. To determine it, hydraulic engineers first...

I'm lost on this. Any other suggestions?

Would the lid be removed at that point because F_you cancels out F_N?

Homework Statement A Partially evacuated airtight container has a tight-fitting lid of surface area 77m^2 and negligible mass. If the force required to remove the lid is 480N and the atmospheric pressure is 1x10^5 Pa, what is the air pressure inside the container? Homework Equations...

Ok. I1w1=I2w2 w1=I2w2/I1 OK so I have to find the angular velocity of the bullet before the collision? How can i find the Inertia of the bullet?

I would say linear. m1v1=m2v2 v1=m2(wr)/m1 v1=4.003(10*.25)/ .003 v1*sin 60=2888.91m/s?

I don't know why i put Equilibrium. It must be momentum. P=P mv=Iw??

I don't understand how to do equilibrium problems. I don't know how to set them up and where to start. here is an example. Can anyone please help? Homework Statement A uniform thin rod of length 0.50m and mass 4.0 kg can rotate in a horizontal plane about a vertical axis through its...