Recent content by fyzikschik

Would changing the launch angle change the vertical height?

Homework Statement I have a general question. If you were to determine the intial velocity of an object shot vertically into the air, how could you use kinematics equations to predict the height and distance the object would reach if you were then later given a launch angle? Does this mean...

thanks for being patient, doc. all I'm trying to do is figure out if the spring constant of a spring can be determined by its own mass and its own length. and if that k would apply if i was to use it in a calculatation once the spring is on an inclined plane. the main purpose of this is to...

since Fe=kq1q2/r^2 Fe= k*(4.0 X 10^-6C)^2/ (0.20m)^2 Fe= 3.6N how are they acting? they are supposed to repel each other, but i don't understand how that would affect the magnitude of the force. To combine them, i think i have to add 3.6N + 3.6N..but that isn't working...

Homework Statement three spheres, each with a negative charge of 4.0 X 10^-6 C, are at the vertices of an equilateral triangle whose sides are 0.20m long. Calculate the magnitude and direction of the net electric force on each sphere. Homework Equations Fe= kq1q2/r^2, where k is the...

and to further clarify, no mass will be attached to the spring. only the spring itself will be in motion.

i'm going to be given a launch angle and a distance and i have to determine how far i need to pull this spring back to hit a target. I'm assuiming (and according to doc al) that since the force constant is the same that i should just measure the mass of the spring, and say (k=m*g*x). I've left...

so then, at an angle theta, k=*m*sintheta*9.8/x ?? i'm assuming we can discard the force of tension and the normal force (since they are perpendicular)

I guess my real question now is, do I have to attach a mass to this spring and measure the k at the angle? Would the k be the same if I hung the spring vertically with the same mass at a 90 degree angle? Because I'm confused as to whether the k changes if the spring is at an angle or to the...

ok, so the force would be gravity, k= m*sin30*9.8/x?? would force of tension be included? what about the normail force, because we are talking about the spring being in contact with the inclined launch pad

so then i should just ignore the fact that this spring is inclined and stretched at an angle and at a a fixed distance and just say that since f=kx therefore k=mg/x ...right?

Homework Statement how would you find the k (N/m) of a spring that is inclined at an angle (for ex. 30degrees)? Do you just ignore the fact that it's inclided at an angle? By the way, the spring is stretched at 8cm. Homework Equations hooke's law: F=kx The Attempt at a Solution...

projectile motion --please help :( Homework Statement you have a spring launcher and it can shoot springs at angles that you can alter, but you need to find the velocity at the given angle. the velocity you need to find is like muzzle velocity. you're supposed to stretch the spring and it...