Recent content by GoSS190

Homework Statement A balloon contains 6000m^3 of helium at 28 degrees C. and 99kPa absolute. Just before launch determine the mass of the balloon. Homework Equations Determine the mass of the balloon. The Attempt at a Solution I think you might have to use PV=mRT but I am not...

The tension force in the rope is working against the force of gravity as well as the force of friction on the block

Well i know that KE is equal to 1/mv^2 and the potential energy of a spring is equal to 1/2kl^2. The work done by friction is going to be equal to μkmgl

A mass M slides across a horizontal table. It collides with a spring, compresses the spring, and then the mass-spring system rebounds. This system can be used to find the spring constant k. When the mass first hits the spring at x = 0, it has speed v0. a.) Let the coefficient of kinetic...

A block of mass M is being pulled up an inclined plane at a constant speed, by an attached rope that exerts a tension T. The block is pulled a distance L. The plane makes an angle θ with the horizontal, and the coefficient of kinetic friction between the block and the incline is μk. a.)...

well its not really a question that i have to solve. I am doing a project where I have to determing the distance a snowboarder will go. I have taken into account the friction forces for the hill but I don't know how to take into account the friction for the entire curve of the jump.

I need to find the frictional forces and a snowboarder going off of a cuved jump. I know the coefficient of friction for the snow and the snowboarder is .05. The veolcity as the snowboarder is coming into the curved jump is: sqrt(2(9.8*100*sin(theta))-(.05*9.8*100*cos(theta))) I know...

Need to find the equation for the velocity of a snowboarder going down a slope about to hit a jump. I know that the potential energy for going down the hill is mgh and that friction depends on the normal force which is mgcos(theta) and the distance going down the slope. I need to figure out what...

A 75 kg shell is fired with an initial speed of 125 m/s at an angle 55 degrees above horizontal. Air resistance is negligible. At its highest point, the shell explodes into two fragments, one four times more massive than the other. The heavier fragment lands directly below the point of the...

The force at the top would be adding to each other while at the bottom they would be opposing. But how do u find the normal force?

In an amusement park ride called The Roundup, passengers stand inside a 18.0 m-diameter rotating ring. After the ring has acquired sufficient speed, it tilts into a vertical plane. Suppose the ring rotates once every 4.90 s. and the rider's mass is 58.0 kg. A.) With how much force does the...

i got an answer of 556177.07 but that doesn't seem correct to me and I don't know what i did wrong

is it mw^2r

That is the part that I don't understand really

2pi / 4.9 is the angular velocity