Recent content by whyorwhynot

Homework Statement Write this expression in factored for as an algebraic expression of a single trig function (e.g., (2 sin x+3)(sin x-1): sin x - cos2x - 1 Homework Equations cos2x + sin2x = 1 The Attempt at a Solution 1) cos2x + sin2x = 1 2) sin2x = 1-cos2x 3) -cos2x = cos2x so sin2x =...

I feel like giving up on learning this, really. I don't understand why I can't understand this, yet it seems so simple. Homework Statement Suppose that you loft a tennis ball over the net with an initial speed of 15.0 m/s, at an angle of 50 degrees above the horizontal. At this instant your...

Oh ok, yeah it is the hypotenuse. Thank you for your help!

Thank you for replying. I'm still a bit puzzled though, but if I understood correctly, this is what I did: x = vt (16.8 m) = (14.1 m/s)t t=16.8 m/14.1 t= 1.2 s Vf2 = Vo + at Vf = (7.5 m/s) + (-9.8 m/s2)(1.2 s) Vf = -4.3 m/s I don't understand what to use pythagoreas for though...

Homework Statement A soccer player kicks the ball toward a goal that is 16.8 m in front of him. The ball leaves his foot at a speed of 16.0 m/s and an angle of 28.0 degrees above the ground. Find the speed of the ball when the goalie catches it in front of the net. Homework Equations x =...

I understand it now. Thank you both so so much for your help!

That makes much more sense then. We've been using -9.8 m/s^2 in reference to falling objects though. Would this become +9.8 m/s^2 since the frog is jumping up, not down? Thank you very much by the way!

Kinematics Problem (Solved) I greatly apologize for making this my very first post. I am in great need of assistance though, and I hope someone can help me comprehend how to solve this. It seems relatively simple, but it does not seem to be clicking in my mind at the moment. Homework...