Recent content by Soniteflash

For linear momentum : Pi=Pf 0 = m(-2v) + (2mv) 0 = -2mv + 2mv 0 = 0 Linear momentum is conserved. Hmm, I don't really know an equation for the velocity of the center of mass of a system of particles. I know that the velocities of the boxes are both in opposite directions.

I am not quite sure but I thought it is similar or identical sort of to an explosion.

Homework Statement Two blocks of masses M and 2M are on a frictionless horizontal surface and are held in place with a compressed spring of negligible mass between them. If the blocks are then released and the block of mass 2M leaves the spring with a velocity v, the velocity of the center of...

How would your approach look like? I am wondering how I would arrive at T2

So if V increases that means the period would increase. Oh wait. T is in the denominator of 2πr / T.. so that means if I increase V that would mean that Period would go down. I assume that's my mistake. So it has to be that T increases when V decreases meaning that the mass of the star has to be...

I canceled m1 out.

Ohhhhh, dumb me... I assigned m1 as the Planet and m2 as the Star. Since the m in mv2 / r is referring to the orbiting mass, the mass of the planet cancels out and leaves me with the star so it should be B right?

Homework Statement Planet 1 orbits Star 1 and Planet 2 orbits Star 2 in circular orbits of the same radius. However, the orbital period of Planet 1 is longer than the orbital period of Planet 2. What could explain this? A) Star 1 has less mass than Star2. B) Star 1 has more mass than Star 2 C)...

Thanks. I need to get better at my formulation anyways...

Homework Statement A small metal sphere X is charged by losing 500 electrons. An identical metal sphere Y is charged by gaining 1000 electrons. The two spheres are first put in contact with each other and then separated. If -e is the charge on an electron, what is the charge on each sphere...

Ah, Ok that makes sense then.

Homework Statement A 1.0 Kg mass is attached to the end of a vertical ideal spring with a force constant of 400 N/m. The mass is set in simple harmonic motion with an amplitude of 10 cm. The speed of the 1.0 kg mass at the equilibrium position is. A. 2 m/s B. 4 m/s C. 20 m/s D. 40 m/s E. 200...

Oh boy...I added instead of doing sqrt(22+32)...Can't even do wrong stuff correctly...

Ah, I see my error i think. Kinetic Energy is a scalar and not a vector quantity.

Homework Statement Two pucks are moving on a frictionless air table are about to collide. The 1.5 kg puck is moving directly east at 2.0 m/s. The 4.0 Kg puck is moving directly north at 1.0m/s. What is the total kinetic energy of the two-puck system before the collision? A. Square root of 13 J...