1. ### Angle Theta using relativity

Homework Statement A skydiver is strapped to a rocket and shot into outer space. There is no air resistance so he is able to make his arms into a 45° angle with respect to his body and pretend they are "wings." To a stationary observer on the Moon (we will consider the Moon stationary for our...
2. ### Galilean Relativity (Invariance) Problem

Homework Statement Imagine two inertial frames, S and S'. Inertial frame S' moves with velocity v0 = 5 m = s in the upward (positive y) direction as seen by an observer in frame S. Now imagine that a person at rest in frame S throws a ball with mass m straight up into the air with initial...
3. J

### How do I calculate masses predicted by the force law equation

I have attached the problem and my attempt at solving it, there is a strange equation under the data analysis section that I do not understand. I'm and suppose to calculate a theoretical value for a slope and compare it to the one I have.
4. ### Momentum and Collision help needed (2 questions)

Homework Statement A car braking will decelerate at .8g. If the car's mass is 1200kg, how much horizontal force does each tire exert on the road? What is the coefficient of friction between the tire and the road? A 2kg steel ball rolling at 4m/s strikes a stationary 5kg steel ball elastically...
5. ### Friction problem on a incline

Homework Statement A 20kg box has a static coefficient of friction of 0.28. If a force of 200N is applied at an angle of 45deg, is the box able to move. Explain why once the static friction is overcome, the frictional force decreases and the box moves easier. Homework Equations F=m*a Ff=μFN...
6. ### Magnetic Dipole due to an electron's orbital motion

Homework Statement Select all of the following which are possible combinations of Lz and θ for hydrogen atoms in a d state, where Lz is the z component of the angular momentum L, and θ is the angle between the +zaxis and the magnetic dipole moment µℓ due to the electron's orbital motion...