2. A train engine has a mass of 3,000 kg. The freight car has a mass of 1,000 kg and is at rest (sitting still). The train engine approaches with a velocity of 2.0 m/s.
What is the momentum of the train engine before it hits the freight car?
https://talkandcomment. com/p/7c1962a2a8b3fdaa145042cc (voice note) *
Train engine
Freight car
O 2.0 kg*m/s
3,000 kg*m/s
0 6,000 kg*m/s
O 8,000 kg*m/s
3,000,000 kg*m/s

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

The photo above shows oil and vinegar in a pitcher. the top make a claim about about the density of the vinegar compared to the density of the oil summarize the evidence to support the claim and explain your reasoning

You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?