Recent content by idllotsaroms

Homework Statement Homework Equations The Attempt at a Solution How are their angular velocities the same? I thought Angular velocity = v/r where v = velocity and r = radius. In this case isn't the radius of big ben much larger and therefore have a much smaller angular velocity?

Thank you Rude man, but how would I remove the extraneous equations? Could you show me an alternate shorter way to go about doing this? Also, would I have to solve for a when using Fy = may = N - mgcos*arcsin(h/s)?

Homework Statement http://postimage.org/image/gprwhko37/ Could someone check my work to make sure I'm doing this problem correctly? Where: s : hypotenuse or distance h : height uk : coef friction Homework Equations W = F*D Force Normal = mgcosθ Wfriction = (uk * N) *...

Thank you for the help Haruspex, I appreciate it!

Yes, sorry they are on the same level, so speed at B is equal to the speed at D Is it because the bead is moving in a circular motion at that point (semi circle)? Since they are at the same level, they have the same potential energy, the same kinetic energy, and therefore the same speed So...

Homework Statement http://postimage.org/image/sezpli4pv/ Having some difficulty understanding some concepts of Work and Energy. Homework Equations W = F * D KE = 1/2 mv^2 PE = mghThe Attempt at a Solution A) Speed is at B is less than the speed at D, because B has more PE than D B) False...

Right, maybe the car slams into the wall and comes to an immediate stop after traveling at a constant velocity and ending with a velocity of 0? I think if it was equal and opposite the car would have bounced back--it didnt occur in this case. "Either the wall is so massive that it...

I'm not that great at this stuff, but what have you attempted so far? You should start off by thinking of what equation to use and drawing a Free Body Diagram Keep in mind Newton's Third law

I would find the sum of forces in the X and Y planes first by drawing a Free-body-diagram and splitting the mg force into its x and y components. You could then use the ƩFy = may = Fnormal - mgcos30 Try to solve for Fnormal which you can plug into another Newton equation I might be wrong...

Okay, I think I understand it now, its like if a person was on the surface of the Earth and as they got farther and farther away their speed would decrease because the force of gravity (which is the only force acting on the stars) would diminish and the person would go slower and slower as he...

Right that would explain the acceleration decreasing, sorry I understood that part already, (even thought I said "and acceleration decreasing") but am having a difficult time understanding how the speed is decreasing.

mm speed is a scalar and acceleration is vector? Acceleration of the rate of change of the speed.

Homework Statement http://postimage.org/image/7rgmo1527/ How is the speed decreasing and acceleration decreasing in this problem? Homework Equations Kepler's Laws? The Attempt at a Solution I remember in lecture my professor was saying something along the lines of objects...

Homework Statement http://postimage.org/image/530mgjivr/ How come the solution states: (20)(9.8)(0.7cos30 - sin 30) isn't sin30 going in the positive direction? shouldn't the solution be Sin30 - .7cos30? Also, when solving these types of problems should I leave the mg part outside of the...

So the question states that the ball travels during the second 10s and you are trying to find the distance after the first 5 seconds? Use a = 2d / t² to find acceleration where t will be your 10 seconds Then use the equation d = ut + ½ at² where t will be your 5 seconds and solve for...