Recent content by pstfleur

bumping again for the 2nd day :)

bump bump bump

hello lol

Where did that 86040seconds come from?

1. A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -4.00rad/s2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final value of -25.0rad/s. While this change...

1. Kevin has a mass of 87kg and is skating with in-line skates. He sees his 22-kg younger brother up ahead standing on the sidewalk, with his back turned. Coming up from behind, he grabs his brother and rolls off at a speed of 3.4 m/s. Ignoring friction, find Kevin's speed just before he grabbed...

:confused: I think I'll just give up on this problem. I am getting lost

Thanks a lot..I got the right answer now..

bump.. I still need help on this problem:confused:

1. A model airplane is flying at a speed of 22 m/s on a horizontal circle of radius 16m. The mass of the plane is 0.90 kg. The person holding the guidelines pulls it in until the radius of the circle becomes 14m. The plane speeds up, and the tension in the guideline becomes four times greater...

I guess Ill go ahead and answer the rest of the Question... KE=(1/2)mv^2 W=Ke final- Ke initial W= (1/2)(7.3kg)(29^2) =3069.65 or 3.1*10^3 for the Hammer.. You can use the same to Find KE final for the Gun..

OK WOW, clearly I input some wrong numbers in my calculator.. Thanks for the help Doc..Sorry for wasting ur time

1. The hammer throw is a track-and0field event in which a 7.3-kg ball (the hammer), starting from rest, is whirled around in a circle several times and released. It than moves upward on the familiar curvinf path of projectile motion. In one throw, the hammer is given a speed of 29 m/s. For...

But its says the banked curve is frictionless?? i still don't see the correlation for Vo

Where? a radius of what? 1?