An open box-car has a mass of 30,000 kg and is moving on a level railroad track at 4.00 m/s. 1,000 kg of water falls straight down into the box-car. The velocity of the box-car after the water falls into the box-car is
7.01 m/s.
6.55 m/s.
5.02 m/s.
3.87 m/s.
As we discussed in
Perfectly Inelastic Collision -
- wherein
Two bodies stick together after the collision ,so there will be a final common velocity (v)
Option 1)
7.01 m/s.
Incorrect
Option 2)
6.55 m/s.
Incorrect
Option 3)
5.02 m/s.
Incorrect
Option 4)
3.87 m/s.
Correct