Newton's Laws Blog 2
Please answer the question in the greatest possible detail.
An athlete grips a light rope that passes over a low-friction pulley attached to the ceiling of a gym. A sack of sand precisely equal in weight to the athlete is tied to the other end of the rope. The athlete climbs the rope, sometimes speeding up or slowing down as he does so. What happends to the sack of sand? Please discuss the motion of the athlete and the sack relative to both the ground and to the rope.
Posted by georgecelona
at 3:35 PM EDT
Ap Newton's Laws Blog 1
Please respond to the question below by posting an answer.
The force of gravity on a 2kg rock is twice as great as that on a 1 kg rock. Why then doesn't the heavier rock fall faster?
Posted by georgecelona
at 3:00 PM EDT
Rocket Blog
Hi all,
I couldn't upload the graphs themselves into this blog. However after plotting graphs of velocity vs time for 3 different rockets, I obtained accelerations of
313 m/s/s
170 m/s/s
337 m/s/s
There were a total of 5 rockets launched with different mixtures, which were:
1. 1/3 water
2. half full
3. 3/4 water
4. all air
5. way too overpowered
Discuss which ones you think match these accelerations and why. We will analyze in class tomorrow.
Posted by georgecelona
at 4:13 PM EDT
1st AP discussion blog
Please Answer the following question, and then also respond to at least 1 other person's entry.
Can an object be increasing in speed as its acceleration decreases? If so, give an example. If not, explain.
Posted by georgecelona
at 3:05 PM EDT
