A ball leaves the pitcher's hand at 80 meters per second. By the time it hits the bat 2 seconds later it has slowed to 60 meters per second. What is the ball's average acceleration? ​

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?

What is the measurement of how fast an object moves relative to a reference point?