Recent content by OVB

Yeah I have fundamentals of physics, the fifth edition. I hear the new test is called "F = ma." does this mean that it is all mechanics?

Oh, I understood the background info, it's the spring that's confusing me. The diagram shows it is small compared to the 53cm so I can't say what its length is. Since I don't know the k (or how to solve for it since there is no length of spring or force given) I can't determine the time between...

Homework Statement A mass of .59 kg and a velocity of - 0.75 m/s approaches a stationary mass of 0.35 kg that is 53 cm away from the edge of a wall. The stationary (m2) pushes against a spring (elastic collision) that is within the 53cm of separation and reverses direction. How far from the...

Homework Statement A dragster of mass m races another a distance d from a dead stop. Assume a constant instaneous power P for the entire race (provided by engine) and the dragster is like a particle. Find the elapsed time for the race. Homework Equations Well, P = Fv is needed for...

I just realized I made a mistake...the 50cm is the relaxed length of the spring. I apologize for not reading my question over carefully enough.

so...since both springs are stretched by the block, the restoring forces on the springs when the rope is cut causes the block to move upward? (i.e., back to equilibrium?). So then do the combined potential energies of the two springs equal the change in potential energy (5 J), thus giving the...

yeah, I have in a free body diagram (finally) a tension force exerted on one spring [upwards], and a spring force exerted on the block [upwards] (for the spring attached to the block) and a spring force exerted upwards with a tension force exerted downards, but because of Newton's 3rd law the...

The problem is hard to describe, but ill give it a shot: there is a 50cm long spring ( k = 500 N/m) hanging from the ceiling and a 10cm cord connecting it to another identical spring, which supports a 100N box. In addition, there are two (limp) 85cm cords. One is hanging vertically from the...

no, I meant that it was originally at an angle with respect to what it would be at rest (i.e., bob below pivot) , and the velocity is supposed to be like that since it is supposed to be solved symbolically.

A mass is attached to a pendulum of length L that is at an angle theta (8) with respect to the normal. The mass has an initial velocity Vo. What is the minimum speed (symbolically) needed for the mass to go all the way down to its lowest point and all the way back up its highest point (as in...

No, that is how it should be. KE of F = 0.5(KE of son) Does anyone know why the answers are 2.4 and 4.8?

yeah, but why? Why can you use the acceration derived from the formulae I used for the mass m2 if it is not being accelerated in that direction?

A man is on a bosun chair attached to a frictionless massless pulley and is holding onto the other end of a rope. (at ground level) a. What is the force he must pull himself up at if he is to move at a constant speed? Is the set up T + T = mg? b. If instead the rope is held by someone...

Say a father who has a mass that is two times that of his son is racing against him, and his kinetic energy is half of his son. When the father increases his speed by one m/s, the kinetic energies are equal. I do this: M = mass of father V = velocity of father 0.5MV^2 = 0.5(0.5mv^2)...

A concept I don't understand is the force exerted by one block of mass m1 on a block of mass m2 and vice versa when a force F is applied to m1. What I mean is, say you have to blocks next to each other and a force F is applied to m1. My physics teacher says m1 will accelerate, but m2 will...