Recent content by sdoi

As in, Etotal= Eg, Etotal'=Ek ?

Homework Statement Two boxes are attached to opposite ends of a rope passing over a frictionless pulley as shown below. The mass of Box A is 15kg and the mass of box B is 12kg. The system is originally at rest with the bottom of box A at a height of o.85m above the floor. When the system is...

Homework Statement There are four pieces of rope tied between four trees. Given the forces of tension in three of the strands, find the force of tension in the remaining rope. Rope 1: 2.1x10^-3N [20°E of N] Rope 2: 1.6x10^-3N [60° E of S] Rope 3: 1.9x10^-3N [40° W of S] Homework...

Homework Statement An astronaut enters a rocket ship and gets blasted to another planet. The mass of the planet is 2.5 times as large as the mass of Earth, and the radius is 1.2 times as large as Earth's. If the astronauts scale at home says "60.0kg", what will it say on the new planet? In...

Ok, I'm just a little confused as to what you were trying to say before. μmg, where does that equation come from? (0.11)(47kg)(9.8m/s^2) =50.6N and what does that give me? is that the horizontal component of Ft?

μmg= Fs does it not? By finding the Fs I can determine the minimum horizontal force needed for the sled to move, but μ is for kinetic friction, I didn't think I could use that for static friction.

Homework Statement An adult is pulling two small children in a sleigh over level snow. The sleigh and children have a total mass of 47kg. The sleigh rope makes an angle of 23degrees with the horizontal. The coefficient of kinetic friction between the sleigh and the snow is 0.11. Calculate the...

Homework Statement Block A and B are connected by a string passing over an essentially frictionless pulley. (Block A is on a horizontal plane, while block B is suspended in the air) When the blocks are moving block A experiences a force of kinetic friction of magnitude 5.7N. If mA= 2.7kg and...

In order for the plane no remain airborne there needs to be a normal force as well to cancel out the force of gravity and air resistance to counter the forward thrust of the engine.

Two forces, Negative force of gravity, and the thrust of the engine.

oh sorry, "If the forward thrust provided by the engine is..."

Homework Statement Assuming an aircraft has a force of gravity of 6.6x10^4N [down] acting on it as it travels at a constant velocity of 6.4x10^2 km/h [w]. If the engine is 1.3x10^4N [W] determine: (a) The upward lift force on the plane (b) The force due to air resistance on the plane...

And that simple mistake complicated everything. That pretty much fixes all of the problems I was having. Thank you very much!

I'm working on it, I can't seem to find it in my PF.

Within my calculations I have used the appropriate angles, right? I've kept each axes in mind. Did I calculate the resultant correctly? I'm not entirely sure how to find the angle. I do however know from my diagram that it will be some degree N of W. Without the appropriate angle I cannot...