00:04
Curtis found that the actual height of his puck was less than the predicted height that he made based on calculations.
00:12
And he said this was due to using the wrong mass in the calculation.
00:17
To understand whether or not this is plausible explanation, we need to understand conservation of energy.
00:23
It says that no energy is gained or lost.
00:25
It just changes forms.
00:27
The energy of the puck at the bottom of the hill would be all kinetic energy.
00:32
And the formula for kinetic energy is one -half mv squared.
00:36
So if we know the mass of the puck and we know the velocity of the puck, we could find the total amount of energy and jewels for the system.
00:43
And this must be equal to the energy of the puck at the top of the hill.
00:46
When it reaches its max height, it's at rest for a split second.
00:51
And the energy is all potential, gravitational potential to be specific.
00:57
The formula for gravitational potential energy is m, g, h.
01:02
So if we were trying to find or predict a height based on an initial velocity, we would see that mass cancels out.
01:13
So curtis's explanation is incorrect.
01:16
The mass is not a factor that determines the height of the puck...