Recent content by Newlander

Hmmm . . . so, I should determine viy? If so, 3.13 m/s sin(30) = 1.57 m/s . . . sorry--not clear on how this will help me arrive at what's noted as the correct answer. I did plug this figure into vf2 - vi2 = 2ad, and then determined d from that . . . and then plugged that d into d = vit +...

Homework Statement "A boy throws a rock with an initial velocity of 3.13 m/s at 30.0 degrees above the horizontal. How long does it take for the rock to reach the maximum height of its trajectory?" vi = 3.13 m/s tmax height = ? vf = 0 m/s (at max height) a = -9.8 m/s2 Homework...

I think I understand what you mean by the balance of components, as the y-axis divides the two T forces, but . . . I'm still not following, exactly. Any other way to frame it? Would you have approached things similarly?

Homework Statement "A 6.0 kg box is held at rest by two ropes that form 30-degree angles with the vertical. An external force F acts vertically downward on the box. The force exerted by each of the two ropes is denoted by T. . . . The magnitude of force F is 410 N. The magnitude of force T...

Thanks very much for the prompt and informative reply!

Homework Statement "A ball is thrown straight upward with a velocity of 18 m/s. How much time passes before the ball strikes the ground? Disregard air resistance." vi = 18 m/s a = -9.8 m/s2 t = ? [not sure: vf = 0 m/s] Homework Equations vf = vi + at The Attempt at a...