Projectile motion

http://www.youtube.com/watch?v=X8GFWVy2ghM, If you fast foward to about 24 seconds into the video to the cat jumping up and off the chair, you will see physics. When I first saw the video I was let down, such a long video and the cat doesnt even jump that high. However, when I was working on my lab write up for projectile motion all I could think about was physics. Just from this video we can see it took the cat less than 5 seconds to jump off the chair and free fall down to the floor (Note that he hits almost hits himself with the table). We can analyze both his horizontal motion a vertical motion independently. This makes me wish we had cats in our classroom that would help us as stunt doubles in our videos. It would be a little more exciting than dropping a ball. Do you think?

Amelia Tavarez

Test.

Test.

Sent from my iPhone

Velocity of a Boat

Velocity of a boat

This is a picture i took out of my apartment window. It shows a boat going under the Brooklyn bridge, which i watch happen every single day. I never realized the physics i could use by looking at the boat. After doing Lab 3 i realized i am able to record the boat moving and later put it into logger pro and figure out the speed at which the boat was moving. By doing that i would be able to analyze to boat moving and determine the velocity.

Free Fall

Hello all,

Since we are starting to learn about free fall I thought it would be useful to share a link to a video on free fall. It is a song, a bit nerdy, but nevertheless helpful because it explains the basics of free fall. 

http://www.youtube.com/watch?v=rom3psXk7Q8

Constant Speed or Constant Velocity?

Every single one of us in the classroom at some point has or will use the electric stairs inside John Jay College. Now that I am taking physics and learning new concepts I have realized the electric stairs travel at a constant speed because all parts of the stairs move simultaneously. However, many would say the electric stairs move at a constant velocity, but in reality this is not true. Even though the speed remains the same, the direction of the electric stairs changes, therefor it is incorrect to say it has a constant velocity because there is a change in direction. 

By: Wellington Cordova 

Constant Speed or Constant Velocity?