The graph below shows the time and position of a motorcycle as it travels through several photogates. Calculate the velocity of the motorcycle as it
moves from gate A to gate B.

A. 1 m/s
B. 3 m/s
C. 4 m/s
D. 2 m/s

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?