Asmall dog is trained to jump straight up a distance of 1.2m. how much kinetic energy does the 7.2kg dog need to jump this high? ( the acceleration due to gravity is 9.8m/s2)

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

This is one type of line graph in which the independent variable is time plotted on the x axis and the dependent variable, also numerical, is plotted on the y axis.

What is the role of lenses in microscopy?