Recent content by Turtlie

Ah looks like I was right then, and thank you for the hint ;) I've got another question. A flywheel car is capable of giving a car a constant acceleration of 0.5m/s2, but only for as long as it is wound up for (if it is wound up for 5 seconds it will accelerate at 0.5m/s2. Once the flywheel...

Homework Statement x(t) = -0.01t^3 + t^2 - 20t + 4 Homework Equations Min is when t = 12.3 Max is when t = 54.4 The Attempt at a Solution I got -0.03t^2 + 2t - 20 as the derivative. I substituted in t = 12.3 and 54.4 and got 0.02 and 0.19 which don't seem right at all. Because...

Homework Statement A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 53.9 m/s^2. The acceleration period lasts for time 7.00 s until the fuel is exhausted. After that, the rocket is in free fall. Find the maximum height ymax reached by...

Wait so which arrow would be the answer? The one that I labeled as 3? Edit: Well 3 isn't the answer. I tried that one so now I have like 1 try left.

Is that right? Not completely sure about four though :confused:

Homework Statement Draw the vector C = 1.5A -3B (Mastering Physics problem) A is 4.5 and B is 1.0 The Attempt at a Solution I've tried it 4 times and still can't do it. I've looked at some sites but I guess I just don't understand it. I've heard of the head to tail method, or something...