Recent content by Oldblood

I started wondering about this after solving a problem on the exam. Here is the problem: 2 planes has a speed v1 and v2. They are flying from the airport at the same time. The difference between their landings on the same airport is t. Express the distance between the airports as functions of...

Homework Statement Whats more destructive? A front collision between 2 identical cars, or 1 car with the same speed but driving into a mountainwall? Homework Equations Equations for conservation of energy and momentum. The Attempt at a Solution Hi guys, I am just wondering if I am...

Actually I have to consider change in gravity. Because they ask me to find velocity very far up and I am working with initial velocities that are very high

well my point was, we would still have a sepearation by this center angle, even thoug it would be extremely small in that case. The reason I mentioned the north pole and equator was so its easy to see that the separation in space matters, no matter how small it is. Its just easier to picture...

Well if you say they are droped from the same height at the same time. Then you would have an angle between them. By angle I mean the the central angle. (if one is droped on the north pole and one on equator the central angle is 90 degrees). If the object were close this angle would be very...

I think you are right. If the Earth was stationary they would hit the ground at the exact same time according to Newtons laws. However, its not and it will be affected by the smaller mass. Call the 2 smaller masses m1 and m2 and the larger mass (planet) M. m1 > m2. If we first look at the...

Homework Statement Find the height of a projectile being shot in the oposite direction as the center of the Earth with initial speed v. Homework Equations Newtons law of gravity Kinematic equations? Possibly conservation of energy equation The Attempt at a Solution This problem...

Btw, your first equation is not relevant

A body that moves in a circle needs a net force to move in this circle. If the circle has a radius R and the body moves with a speed v then the force needed to keep the body in the circle is given by mv^2/r, using Newtons first law and sentriple aceleration. This is one way to write this force...

anyone?

I appreciate any help. The goal is to calculate the potential energy in a 4 particle system making up a square

Homework Statement Find the potential energy in a system being 4 particles, each with mass M forming a square with sides d. Homework Equations Newtons law of gravity The Attempt at a Solution First I was trying to find the gravitatinal field as a function of d. I soon realized...

Homework Statement We have a lever system. The end of the left side is a distance w1 from the pivot. The end of the right side is a distance w2 from the pivot. When no masses are attatched the lever is touching the ground on the left side. We place a known mass called m1 on the far left side...

I have a question about this. When the asteroid hits the earth, won't the frictional force component during the impact generate a torque to the earth, thus slowing down its angular velocity, plus adding rotational inertia, slowing it further down? I am not sure about this, that's why I ask.

If the answer was 0 there would be no collision at all. In a collision you have 2 magnitudes of implulse. The sum of these are 0, that's the whole point with conservation of momentum. Since the sum is 0 we don't get an increase or decrese of momentum in the 2-cart system. And this is offcourse...