So for part 1 the answer is 9J but I need to learn to method used to get the 9J?
This is what I don't understand, however if I knew the height I would be able to work out the first question?!?!
throwing a ball straight up in the air starts an energy conversion process.
on the way up it's converting KE to GPE and on the way down it's converting GPE back to KE. The peak value of GPE occurs when KE=0 and KE equals zero when it's velocity is zero.
the maximum efficiency of an energy conversion is 100%... so part 1 is just asking you to find the value of h at which mgh=1/2 m v2
you already know m,g & v so it shouldn't be too difficult.
throwing a ball straight up in the air starts an energy conversion process.
on the way up it's converting KE to GPE and on the way down it's converting GPE back to KE. The peak value of GPE occurs when KE=0 and KE equals zero when it's velocity is zero.
the maximum efficiency of an energy conversion is 100%... so part 1 is just asking you to find the value of h at which mgh=1/2 m v2
you already know m,g & v so it shouldn't be too difficult.
ok now the first part makes sense, 0.5(0.5x6^2) = 9J
I have an exam tomorrow and I'm panicking, So for part 1 the answer is 9J but I need to learn to method used to get the 9J? This is what I don't understand, however if I knew the height I would be able to work out the first question?!?!
Height is calculated using the GPE equation. Assuming you have calculated gain in potential energy in part 1, rearrange Ep = mgh to height = potential energy / (mass * 9.81)
Height is calculated using the GPE equation. Assuming you have calculated gain in potential energy in part 1, rearrange Ep = mgh to height = potential energy / (mass * 9.81)
I would think that four years later OP has worked it out by now.