A 400 kg train car moving at 10 m/s slams into a second train car with a mass of 200 kg at rest. The two train cars stay attached and continue rolling down the track. What is the velocity of
the train cars after the collision?

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?