Wednesday, February 18, 2009

Ticker Tape
50hz(herz)=the needle or whatever you called it vibrates 50 times per second
time=no. of spaces x 1/50 (depending on the herz thing)
speed-dist./time
when the spaces are getting furthur... accelerating
when the spaces are getting nearer...decelerating

Speed and Velocity
Speed is dist/time
Velocity is displacement/time
Average speed=total dist/total time
Instantaneous speed=speed at that instant
When reading graph...
Speed=just read the gradient
Velocity=separate the graph into portions of grpah going up or down
=then count each portion

Scalars and Vectors
Scalar=only have magnitude
Vector=have both magnitude and direction
For vectors...
arrows must have (+/-) sign

Mass Weight Density
Weight =mass x gfs(10)
Density is more than water=sink
Density is less than water=float
Density is equal to water=suspend
Density=mass/volume (unit: kg/m3)
Conclusion
I am going to fail...but that is not goingh to happen...I will pass...just wait and see

Labels: Physics Quiz