Recent content by JDM555

Thank you radargon! I appreciate your help. But there is something else. The next problem says "Although most adults can exert 50W of power, it is clear that neither of the two tasks described in (top problem) can be done by a human. In fact, we have a preferred combination of force and speed at...

Oh ok. So hmm, if the object gains PE, I guess that is where the hint comes into place. PE=mgh correct? m=1000kg, g=9.8, h=1m. Would it just be 9800? t=9800/50=18? 196 seconds? And for part b, m=0.001kg, g=9.8, h=1m. Would it be 0.0098? t=0.0098/50=0.000196 seconds? Those numbers don't seem...

P=W/t If so, I know power is 50 W correct? Since I want t, would the formula be t= W/p? If so, p= 50, so t= W/50. Now, work, W=Fd? Distance is 1 meter. Force? F=ma? Is this right, or am I running in circles here?

Homework Statement Assume 50 W of power is used to perform each of the following tasks (one at a time). a. Lifting 1000kg (1 ton) by one meter. b. Lifting 1 g (0.001kg) by one meter. (Hint: What is the potential energy gain by the object?) How long would it take to complete the first...