Train cars are coupled together by being bumped into one another. suppose two loaded train cars are moving toward one another, the first having a mass of 140,000 kg and a velocity of 0.300 m/s, and the second having a mass of 95,000 kg and a velocity of −0.120 m/s. (the minus indicates direction of motion.) what is their final velocity (in m/s)?

The final velocity of the two train cars is 0.13 m/s.

Explanation:

Given that,

Mass of the first car,

Mass of the second car,

Initial speed of first car,

Initial speed of second car,

It is mentioned that two train cars are coupled together by being bumped into one another. So, it is a case of inelastic collision. Momentum will remain conserved here. Using the conservation of linear momentum we get :

V is the final speed of two cars.

So, the final velocity of the two train cars is 0.13 m/s. Hence, this is the required solution.

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

b.transmitters send radio waves, and receivers capture radio waves.