Just wanted to throw my 2 cents in.. Bodybuilders train for mass, not for strength or explosivness, although they certianly gain much strength as a result of extensive training. You will find that powerlifters and olympic lifters can lift a lot more weight than bodybuilders, and at a much lower...
Heres what I've done. For the total time I got 20s + 120s + (13.33=27.78 + 17m/s^2xt) where t turns out to be 0.85s, for a total of 140.85s.
For total distance I've got (0+13.33)/2 x 20s + (13.33 + 13.33)/2 x 120s + (13.33 + 27.78)/2 x 0.85s, for a total of 950.57m.
Homework Statement
A truck accelerates uniformly from rest to 48km/h in 20s, holds speed for 2 minutes, and then accelerates to 100km/h at a rate of 17m/s^2. How long does it take, from rest, to reach 100km/h and what distance it traveled in this time?
The book says it takes 148.5s, and I...
Hey Jaime,
I've since solved that problem, and from what I've been told from guys at work its more of a 2nd class problem, but anyways, here's how I solved it.
Vtank + ΔVtank = Voil + ΔVoil - 3.4
381.7 + 381.7x3x0.0000012(T-5) = 375.15 + 375.15x0.00041(T-5) - 3.4
From here you just...
Yes that formula works for solids, as well as hollow vessels. I've used it to solve similar problems. This one is just a bit harder since there's two unknowns, the final temperature, and the change in volume. I know that the oil will expand a lot more than the vessel will, and that the oil...
Homework Statement
At 5°c, a steel tank is 6m high, 9m in diameter, and contains oil to the 5.9m level. A heating coil is put into service, causing 3.4m^3 of oil to spill over the top of the tank by the time the final temperature is reached. Calculate the final temperature, if the coefficient...