Recent content by alex7298

i need this tonight any help would be great! thanks

and i know the time it takes. And i meant to say v=d/t above

Homework Statement so i need to find the angular velocity of a solid sphere rolling down an inclined plane. I know the mass, radius, and distance the sphere travels. Homework Equations The Attempt at a Solution I know how to get angular velocity, but i need the translational...

teacher said you can ignore mass of teeter totter. And to rock.freak667, that's exactly how i started. I got 0=(x-3)(Fleft)-(X)(Fright)...

Anyone??

Test Review help! Homework Statement Two children whose masses are 35kg and 55kg are on a playground "teeet totter" which is 3.0m long. Where must the fulcrum be placed so that the children will balance? (35kg on left, 55kg on right) Homework Equations sum of T=0 The Attempt at a...

would I use GPE=mgh for the work? so for problem 1: work=(91kg)(9.8)(1.2)=1070.16J===> P=1070.167J/0.51s=2098.366W?

Homework Statement 2 problems. 1: A man lifts a 91kg person straight up a distance of 1.2m in 0.51s. What power is used to do this? 2: 3.00x10^2kg piano is lifted at a steady velocity from ground to a height of 10.0m. The crane doing the lifting has a steady power of 4.00x10^2W. What time...

F=ma so the net force would be zero, which doesn't make sense becuase the cart is going forward, so wouldn't there have to be a force greater than the one that opposes it?

Homework Statement A oerson pushes a 16.0kg shopping cart at a constant velocity for 22.0m at an angle of 29 degrees below the horizontal. A 48.0N frictional force opposes the motion of the cart. a)what is the magnitude of the force the shopper exerts on the cart. Determine the work done...

gah i made another stupid mistake i did (1/2g)/V^2 for some reason i have the right answer now though lol I am having an off night thansk tough

lol this time i got 4.2x10^4m/s which is the right answer. Maybe i did forget the squre root. Thanks I had one more question and it is: Suppose the surface of a space station is rotating and 35.8m/s. What must be the value of r (radius) for the astronauts to weigh one-half their weight on...

Homework Statement A satelite is placed in orbit 6.00x10^5 meters above the surface of Jupiter which has a mass of 1.90x10^27kg and has a radius of 7.14x10^7m. Find the orbital speed of the satelite Homework Equations V=sqroot(GM/r) The Attempt at a Solution First i added the...

the only equations that i can think of that are of any relevance are Uk=Fk/Fn Fc=mv^2/r and that's about it...but i don't know where to start because the only thing it gives you is velocity

nvm about the first question. i just realized i put 38kg instead of 83. now i only need help on the second