A line with a positive slope on a distance-time graph shows that the object

a) is speeding up
b)is at rest
c)is moving toward the origin
d)is moving away from the origin

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

Rank the automobiles based on the magnitude of the force needed to stop them, from largest to smallest.2000 kg car going 5m/s500 kg car going 20 m/s1000 kg car going20m/s500 kg car going10m/s1000 kg car going10/s4000 kg car going 5m/s 0 0 603