Recent content by ysk1

I keep getting the questions wrong. I'm so frustrated. I'd appreciate it if anyone can tell me what's wrong. Which statements are correct/incorrect for two oppositely charged, isolated parallel plates (Isolated means that the charge stays constant ): (C=capacitance, U=stored energy, +Q and...

Question: A 500 g cart is released from rest 1.0 m from the bottom of a frictionless, 30 degrees ramp. The cart rolls down the ramp and bounces off a rubber block at the bottom. During collision, the cart and the ramp are in contact for 0.0267 sec. The average force exerted by the ramp on the...

I'm stuck on the questions below. Please tell me how to solve them. Thank you. 1. How fast must a plane fly along the Earth's equator so that the sun stands still relative to the passengers? In which direction must the plane fly, east to west or west to east? Give your answer in km/hr...

Can inextensibility of rope also make acceleration of the movable pulley decrease to one-third, one-fourth, etc.?

I understand the concept of relative motion, but I don't know why I can't understand what Galilean Transformations are. Could anyone please explain it? Thank you.

How could you know which configuration of the ropes will give that condition?

I came across some questions where one box's magnitude of acceleration differed from another box's magnitude of acceleration. Please explain why and how this can be true. Thank you.

Now I got it. I had made a small mistake. Mesmer, thank you for your help. =)

I still don't get this. Please tell me how to do this.

That's right.

Hint: Slope of the d VS t graph is its velocity.

I tried 162.9 degrees but I was told it's wrong. It's very frustrating.. :( The question should explain what it means by "with respect to positive x-axis". What should I do?

First, change km/h to m/s for convenience. Then set up the equation x = Vit + (1/2)at^2 for each object: Police car: x + 13.889 = 25t + t^2 ------> x = 25t + t^2 - 13.889 Speeder: x = 38.889t Now, make x of police car and x of speeder equal each other and you get: 25t + t^2 -...

Now I have problem with the question below: Write equations for the constraints and other given information In this problem, the fact that the length of the string does not change imposes a constraint on relative accelerations of the two blocks. Find a relationship between the x component...

A question tells me to find an angle of a vector F with respect to positive x-axis. Suppose the vector F points 17.1 degrees west of north. Then if I were to find angle of this vector with respect to positive x-axis, I add 17.1 degrees and 90 degrees and get 107.1 degrees, right? On a...