Mark the distance traveled on the ramp each time. Using a longer ramp, how does gravity appear to affect the velocity and acceleration of a marble as it rolls downhill?

Learn the difference between distance, displacement, speed and velocity, and how to calculate distance, speed and acceleration.

"The acceleration distance is limited to what's called the Rayleigh length -- the length over which the laser remains focused -- which is determined by the wavelength of light and the size of the ...

The performances of the five models are compared under three sets of conditions: acceleration time and distance known, time known but distance unknown, and both time and distance unknown. The ...