A 1500kg car traveling at 100km/h south collides with a 1200 kg car traveling north at 100km/h. The heavier car continues to move south after the collision, but slows to 25.0km/h. How fast is the lighter car moving after the collision? Please help!!

Ineed the answers for these promblems i have

Urgent pls a. coal consumption levels off and remains flat. b. petroleum, natural gas, and renewables show an increase in consumption c. more nonrenewable resources continued to be consumed than renewable. d. there is little projected increase in nuclear energy use. e. carbon dioxide emissions are projected to decline as we approach 2040. global energy consumption is defined as the total energy used by an individual or organizations from around the world. use the graph above to analyze the projected energy consumption from now until 2040. which statements in the prompt apply? a) a, b, d b) b, c, d c) a, c, d d) a, b, c, d

Aball horizontally thrown from a cliff at 8m/s