A car has an i total speed of 7m/s. it's speed increases by 21m/s. It took 2.1 seconds for the speed to change. What is the acceleration

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?

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

Suppose you plot the distance traveled by an object at various times and you discover that the graph is not a straight line. what does this indicate about the object's acceleration?