Recent content by Smartguy94

i did that integration and got 1.147x10^24 and its still wrong...

m = ρv ∫m = ∫ρv ? which results to same exact answer as before?

i integrate the ρ as a function of r 3.98x10^6 ∫ ρo(1- αr/Ro)dr 0 and got 3641700 as my answer since ρv = m and v = 4/3 ∏ Ro^3 m = 6.07x10^13 but its wrong, what did i do wrong?

Homework Statement The density of a certain planet varies with radial distance as: ρ (r)= ρo(1- αr/Ro) where Ro= 3.98 x 106 m is the radius of the planet, ρo= 4980 kg/m3 is its central density, and α = 0.17. What is the total mass of this planet ? Calculate the weight of a one kilogram mass...

Homework Statement 1. Homework Statement On a frictionless table, a glob of clay of mass 0.72 kg strikes a bar of mass 1.34 kg perpendicularly at a point 0.23 m from the center of the bar and sticks to it. If the bar is 1.22 m long and the clay is moving at 8.3 m/s before striking the...

Homework Statement On a frictionless table, a glob of clay of mass 0.72 kg strikes a bar of mass 1.34 kg perpendicularly at a point 0.23 m from the center of the bar and sticks to it. If the bar is 1.22 m long and the clay is moving at 8.3 m/s before striking the bar, what is the final...

could you please explain why and how do you get this?

i tried to do the experiment, but it simply won't work because when i put the ruler off-centered to the right the ruler keep falling. however, i tried to do it when the ruler is centered, and the result is that the ruler doesn't move anywhere if i rotate both of the wheels with same speed. which...

i did it with a battery and a ruler, the battery's diameter is 1.4cm and so the circumference is 1.4∏ = which is 4.39822cm and then i roled the batery with my ruler and got 4.4cm for one revolution. so it is the circumference of the battery.. but apparently that's not the answer.

Homework Statement The tip of a meterstick rests on the can. The stick is pushed horizontally so that the can rolls on the table, with no slipping between the can and the table or the can or the can and the meterstick. The push continues until the can makes one complete rotation. During the...

Homework Statement A meter stick rests on two counter-rotating wheels. The left wheel rotates clockwise while the right wheel rotates counter-clockwise. There is friction between the meterstick and each wheel. The meter stick begins off-center to the right. What is the resulting motion of the...

second try I try instead of the distance I used in my answer before I use the horizontal distance divided by the velocity of the boat relative to the Earth d = rt t = 750 / 6.5146 t = 115.13 but it's still wrong anyone can help?

nvm, it was just a miscalculation, i got it now, thank you :)

nvm it was just a mis calculation, I got it now, thanks

Homework Statement A 32 kg boy is standing on a 59 kg raft that is 8 m wide. He walks 6 m from a point 1.0 m from the left edge of the raft to a point 1.0 m from the right edge of the raft. If you ignore resistance of the water to the motion of the raft, how far does the raft move during this...