Recent content by housemartin

Hello, I found myself a little bit lost in those concepts. Assume there are many linearly polarized plane waves, all with equal amplitudes, all traveling along z direction, and their polarizations are uniformly distributed in xy plane. Then by superposition principle amplitude of total...

Hi ho! for a) Your assumption about equal potential energies is simply wrong (you can always add a constant to potential energy). What matters is difference in potential energy, not a numerical value at certain point in space. Since it is said that rocket is at rest, you can be sure that the...

If you are associating coordinate X with moving truck (truck's beginning or end), then Vi should be cars speed relative to the truck, not 80 [km/h]. Distances are given in meters, time in seconds, speed in kilometers per hour. So first make all units to be the same. Don't put different types of...

ok, thank you both for help.

well i made few mistakes in my solution, forgot to divide by two and mixed + and - sign in one place. So my final answer is ay = (A-g)/2. What is pseudo i don't know ;] if it's F = -mA, this is kinda way i did this problem. Just i have no idea how to bring this in a simple way.

What are the forces acting on m1, on m2?

Hello, Homework Statement A 45o wedge is pushed along a table with constant acceleration A. A block of mass m slides without friction on the wedge. Find its acceleration in y direction. (Gravity directed down, acceleration due to gravity is g)...

Aphelion is point on the orbit with largest distance from the sun. Why do you plug numbers in force expression, when you need to find potential energy?

You don't need that (mgy). Energy released in the explosion will go into kinetic energy of two pieces. And will linear momentum be conserved in this case? if so, use this fact.

well, if monkey just hangs on the rope what forces acts on monkey and on bananas box? Does net force on banana box or on the monkey change when monkey climbs with constant velocity? If monkey moves up with acceleration, acceleration requires a force, but force always comes in pair from...

Momentum is a vector quantity, just draw those two vectors. That collision is inelastic, means that two masses stick together and travel as one after collision. But because, momentum is conserved, both components of momentum will be conserved too (x and y components). You can simply spot right...

I think you got the answer right. if you think its large, look at acceleration, it's quite large too, and displacement amplitude is small...

98.15=100a writing like this is like saying that the net force makes only 100 kg block to move, and 50 kg block isn't affected by it.

I don't get why do you have those 2.00 s here. What is balls velocity when it hits the plate? When it re-bounces? How is change in momentum related to to impulse?

your equation: m1vo1 + m2vo2 = (m1 + m2)V is for one dimensional case. But you have a 2D problem. Momentum is conserved, and so is its y and x components.