Whats with a=vf-vi/t? According to my teacher it has something on it.. i remember he even demonstrated pulling a cloth with a glass on top of the cloth and when he pulled the cloth, the glass didn't fall?What's with that formula Newton formulated?
2007-02-24 20:06:24 · 2 answers · asked by p319 1 in Science & Mathematics ➔ Physics
Acceleration is the change of speed with time, so if vi is the initial velocity and vf is the final speed, then (vf-vi)/t is exactly the formula for acceleration. Leave me out of the glass on the table discussion.
2007-02-24 20:24:34 · answer #1 · answered by ZORCH 6 · 0⤊ 0⤋
Newton's first law states that every object continues to be in a state of rest or of uniform motion unless and unbalanced external force acts on it. So your teacher must have been demonstrating about this, to show that the glass which had 0 acceleration before the sheet was pulled continued to have that.
a= vf - vi /t is right, but according to Newton's 2nd law you can also use the formula F = ma, where F is force and m is mass. Was that the formula you were looking for?
2007-02-25 04:28:37 · answer #2 · answered by beachblue99 4 · 0⤊ 0⤋