posted by please help on .
a. How much power is generated by a motor that lifts a 300.0 kg crate vertically 8.0 meters in 6.0 seconds?
b. If the crate is dropped on a large vertical spring that has a spring constant of 200,000 N/m, how far does it compress the spring?
a.) P = (mgd)/t so just plug in and solve
b.) mgy(spring) + 1/2ky(spring) = mgy(crate)
y(spring) = mgy(crate) / (mg+1/2k) and now you can plug in again and solve