Recent content by rock_star

Homework Statement Suppose the pendulum bob in the figure has a mass of 0.33 Kg and is moving to the right at point B with a speed of 2.4 m/s . Air resistance is negligible. The diagram is given here : http://session.masteringphysics.com/prob… I calculated the bob's kinetic energy at point...

Thank you for all the help! :D I solved the problem! Ya.. I took du and u as u mentioned and it really helped! :D Thank you so much! :smile:

Yes :smile: I solved the problem.. I did it through U substitution... I took x^3 as U and then solved the problem. The got the above answer you mentioned :smile: and ILATE helped me with other problems of integration! Thank you so much! :D

Homework Statement Integrate x^5sin(x^3). Using Integration by parts. The Attempt at a Solution I don't know which one to take du and u can anyone please help me out? Thanks a lot before hand!

Homework Statement A 20.0-N weight slides down a rough inclined plane which makes an angle of 30.0o with the horizontal. The weight starts from rest and gains a speed of 15.0 m/s after sliding 150 m. How much work is done against friction? Use g = 10 m/s2. Homework Equations W = Fd cos...

Can anyone please help me out?

An object of mass 10.0 kg is released from the top of an inclined plane which makes an angle of inclination of 30.0� with the horizontal. The object slides along the inclined plane. The questions refer to the instant when the object has traveled through a distance of 2.00 m measured along the...

Thank a lot everyone! :) I understood it! :D Thank a ton everyone!

change in kinetic energy! Velocity not given :( Homework Statement Two forces, of magnitudes F1 = 70.0 N and F2 = 35.0N , act in opposite directions on a block, which sits atop a frictionless surface, as shown in the figure. Initially, the center of the block is at position xi = -2.00cm ...

It is showed that I made a mistake :( Rounding error.. It is 3.11 not 2.9 :( Thanks a lot though! :)

Homework Statement Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.90×10^6 N , one at an angle 13.0 degrees west of north, and the other at an angle 13.0 degrees east of north, as they pull the tanker a distance 0.840 km toward the north. Homework Equations...

I tried something like this 2Tcos(126/2) =30 T = 33.07 is it close enough? Thanks a lot!

Homework Statement Pulling the string on a bow back with a force of 30.0lb , an archer prepares to shoot an arrow. If the archer pulls in the center of the string, and the angle between the two halves is 126 degrees, what is the tension in the string? 2. The attempt at a solution...