Free Fall and Vertical Motion at the Earth's Surface
Recall:
Newton's Second Law states:
Net Force = (mass)(acceleration)
Force of Gravity:
Force of Gravity = (mass)(gravitational intensity)
In free fall the only force acting on an object is the force of gravity. So,
Net Force = Force of Gravity
(mass)(acceleration) = (mass)(gravitational field intensity)
Therefore: acceleration = gravitational field intensity
So, on Earth acceleration due to gravity will equal approximately 9.8m/s/s
Using the information above, predict what will happen when you drop a feather and a hammer at the same time when you are on the moon (negligible air resistance).
Once you have predicted, watch the video and see if your prediction was correct. Explain why this occurs.
Newton's Second Law states:
Net Force = (mass)(acceleration)
Force of Gravity:
Force of Gravity = (mass)(gravitational intensity)
In free fall the only force acting on an object is the force of gravity. So,
Net Force = Force of Gravity
(mass)(acceleration) = (mass)(gravitational field intensity)
Therefore: acceleration = gravitational field intensity
So, on Earth acceleration due to gravity will equal approximately 9.8m/s/s
Using the information above, predict what will happen when you drop a feather and a hammer at the same time when you are on the moon (negligible air resistance).
Once you have predicted, watch the video and see if your prediction was correct. Explain why this occurs.
Use the following video to help explain why the feather and hammer fell the way it did.
Now we know what happens when objects are dropped due to their acceleration. However, how does the forces on the objects differ?
Based on what we know we can now solve free fall problems.
Watch the following video and makes note on the following:
What is free fall motion?
How do you solve free fall questions? Provide examples. (NOTE: he used g as approximately -10m/s/s however we use -9.8m/s/s. You should use -9.8m/s/s when you are doing the problems.)
Watch the following video and makes note on the following:
What is free fall motion?
How do you solve free fall questions? Provide examples. (NOTE: he used g as approximately -10m/s/s however we use -9.8m/s/s. You should use -9.8m/s/s when you are doing the problems.)
Complete Learning activity 4.4.