Recent content by ktd

Ok, are you using mastering physics? when I put in those answers (which now make sense), I'm still being told they're wrong!

I have the same problem - I'm confused, too!

Ok, the velocity of the cat would be (4.0 m/s)cos(30degrees), which = 3.46 m/s The time equation would be 2((Vi)(sin_theta)/g), correct? If I use that equation, what would the Vi be here? In other words, to find the distance the cat travels, wouldn't I use this equation: Xcat =...

Here's the problem: A cat is chasing a mouse. The mouse runs in a straight line at a speed of 1.5 m/s. If the cat leaps off the floor at a 30 degree angle and a speed of 4.0 m/s, at what distance behind the mouse should the cat leap in order to land on the poor mouse? Now, I know I need to...

ok so I've found the components, but now what? This problem is totally annoying me!

Here's the question: Sand moves without slipping at 6.0 m/s down a conveyer that is tilted at 15 degrees. The sand enters a pipe 3.0 m below the end of the conveyer belt. What is the horizontal distance between the conveyer belt and the pipe? For some reason, I'm having the hardest time...

Nevermind, I figured it out! I did use my original equation, and that answer is the "new" mass. So, by subtracting this number from the "original" mass, the answer is 1013 kg. Yay!

ok, so get that. now why am I not understanding the other parts? for (b.) I know I'd have to include g in there, but how? if I use the f = ma equation, i get confused

So what if I don't have a time given? (which I don't)

Here's another fun one: A 20,000 kg rocket has a rocket motor that generates 3.0*10^5 N of thrust. At an altitude of 5000 m the rocket's acceleration has increased to 6.0 m/s^2. What mass of fuel has it burned? I've already found the initial acceleration to be 5.2 m/s^2, then I used this...

So the gravity force from earth-->rope = force from rope-->earth; they cancel each other out, right?

The forces on the rope - hmmm. The rope just holds the box, so that would be the only force...?

Ok so the first part (a.), the forces involved are the tension of the rope (up), the weight of the box (down) and gravity (down)...now what?

(a.) I'm not even sure this is how I should solve this: even though the box is at rest, there is tension on it - the weight of the box itself. wouldn't gravity affect it also? or, would the tension be 0 N? I'm confused about the concept itself. For the other parts, I literally plugged in the...

Tension problem - HELP! For some reason, I'm getting myself all confused about this EASY problem: A 64.0 kg box hangs from a rope. What is the tension in the rope if: (a.) the box is at rest? (b.) the box moves up a steady 4.90 m/s^2? (c.) the box has Vy=5.50 m/s and is speeding up at...