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 task?
How long would it take to complete the second task?
The Attempt at a Solution
In the hint, it says what is the PE gain by the object. All I know is PE=mgh. In this case m=1000kg, g= 9.8, h=1 meter? Is this correct? If so is it simply 9800? Even if it is 9800, how does that help with finding "How long it would take to complete the task"?
I know i'm solving for T, so a constant acceleration formula that has t but not vfinal is x=1/2at^2+v_0t+x_0. I'm not sure if this is correct though. Does it come to t^2=2/9.8, and you then get the SQRT of that? Or is that completely off?