Recent content by katamoria

Homework Statement suppose that you can lift no more than 450N unaided. a) how much can you lift using a 2 m long wheel barrow? assume that the wheelbarrow weighs 80N and that its center of gravity is .6m from the wheel. in addition, assume hat the load carried in the wheelbarrow is also...

Homework Statement a. compute the torque developed by an industrial motor whose output is 225kW at an angular speed of 4000rpm. b. a drum with negligible mass and .4m diameter is attached to the motor shaft, and the power output of the motor is used to raise a weight hanging from a rope...

Homework Statement To find the height of a cliff, you drop a rock from the top and 10s ater, you hear the sound of it hitting the ground at the foot of the cliff. Ignoring air resistance, how high is the cliff if the speed of sound is 330m/s. Homework Equations Xf = Xo = VoT + 1/2aT^2...

I really don't think i did that right...

ok so here is what i tried. i drew it so that T1 = time for rock to fall T2 = time for sound to go back Tt = Total time = 10s so T1+T2 = Tt = 10s then I did Vs = velocity of sound, so Vs = deltaX / deltaT solved for deltaX which = height of the cliff and got deltaX = Vs(Tt-T1)...

Since it is all in one direction, straight path, the speed of sound is the velocity. If I plug that in, I still have two variables, time it takes for sound to travel back up the cliff, and how high the cliff is. it is 10s total for ball to hit bottom, and sound to come back up, I can't just...

Homework Statement To find the height of a cliff, you drop a rock from the top, and 10s later, hear the sound of it hitting the ground at the foot of the cliff. ignoring air resistance, how high is the cliff if the speed of sound is 330m/s Homework Equations Xf = Xo +Vo(t) + 1/2at^2...

okay. ^.^

Homework Statement A short train (engine + 4 cars) is accelerating at 1.1 m/s^2. if the mass of each car is 38000Kg, and if each car has negligible frictional forces acting on it, what are a) the force of the engine on the first car, b) force of the first car on the second car. and so on...

i know there's also normal force, and in this case no friction.

awesome, i think i got it. tyvm ^.^ you're very patient, lol.

ok... push is a force. it points toward the object in the direction of the push. so when i solve for the net force i get... sin(11)/mg = (x component of gravity) where mg = 1764N that times the mass plus the push so... Fx = (sin(11)/1764N) + push what is push? V isn't a force so I...

so push is a force acting on the object? again, on the FBD do i draw it tail at object, tip poinging away, or pointing toward object?

when i drew the free body diagram, i drew the axes so that they were parallel and perpendicular to the ramp. i have the normal force going along the positive y, and then gravity having components in both the negative x and negative y directions. is that it? if there is no acceleration from...

Homework Statement A man pushes on a piano of mass 180kg so that it slides at a constant V of 12.0 cm/s down a ramp that is inclined at 11.0 degrees above the horizontal. No appreciable friction is cting on the piano. calculate the magnitude and direction of this push if the man pushes the...