Recent content by aitee

Homework Statement The three 280 g masses in the figure are connected by massless, rigid rods to form a triangle. What is the triangle's rotational kinetic energy if it rotates at 6.5 revolutions per s about an axis through the center? Values given: Mass of each ball at the corner of the...

Homework Statement Force Fx = (10N) sin( (2*pi*t)/4 ) where t is in seconds this force Fx is exerted on a 210 g particle during the interval 0s <= t <= 2s If the particle starts from rest, what is its speed at t = 2.0s ? Homework Equations F=ma I think this is the...

Thanks, I got it figured out now. I just had to get each component in the form Fx/y = F cos/sin(theta) and then set each equaling both W and zero and plug one into the other. I'm not sure why I was so confused in the first place, hindsight--blah. Thanks again.

What I mean is, sin(30) == opposite/hypotenuse; so in the diagram (using a triangle) this would be Fy = F sin 30 == (F hyp)*(parallel to the x-axis opp) /hyp Does this make sense? Like am I understanding why the component equation is what it is? We use sin because is opp/hyp and when we...

Oh, I meant to be doing y.. Our teacher (she's confusing) said that because the angle is not along the x-axis and is on the other side of the vector that the y component would be cos instead of sin.. Sorry, I'm not trying to do it in an unconventional way, I want to do it the simplest and most...

Homework Statement There is a steel beam of 1400kg hanging from the ceiling by two ropes. The first rope (R1) is 20 degrees to the left of the steel attach point, the second rope is 30 degrees to the right of the attach point. Here is the diagram...