Recent content by Amber_

I thought of that, but . . . oh. Oops. Clearly I didn't think hard enough before because I didn't realize the m's should cancel out. Okay I get it now! Thanks for that.

Homework Statement Here is the problem: You are driving at the speed of 28.4 m/s (63.5426 mph) when suddenly the car in front of you (previously traveling at the same speed) brakes. Considering an average human reaction, you press your brakes 0.505 s later. Assume that the brakes on both...

Homework Statement The first stage of a Saturn V space vehicle consumes fuel at the rate of 47400 kg/s, with an exhaust speed of 2820 m/s. The acceleration of gravity is 9.8 m/s2 . Calculate the thrust produced by these en- gines. Answer in units of N. (part 2 of 2) 10.0 points Note...

Okay, thanks! I got it now. You're right. It's not actually a Hooke's law question. You have to integrate 6x^2, get 2x^3 and therefore the answer is 2 joules, not three.

I thought that might be the case, and so I answered 3 joules, and apparently that is not right. The course I'm taking uses this program that does problem sets online. You enter your answers and it tells you right away if you're right or wrong. You get so many tries at the right answer and...

Homework Statement This is the problem; it's multiple choice. When you try to stretch a bungee cord a distance x, it resists with an opposing force of the form b x2, where b is a constant. If b is measured to be 6 N/m2, how much work does it take to stretch the bungee cord a distance...