A 9500 kg boxcar traveling at 14 m/s strikes a stationary second car. The two stick together and move off with a speed of 6.0 m/s. What is the mass of the second car?

The mass of the second car is 12666.7 kg

Explanation:

To calculate the mass of car, we use the equation of law of conservation of momentum, which is:

where,

= mass of car 1 = 9500 kg

= Initial velocity of car 1 = 14 m/s

= mass of car 2 = ? kg

= Initial velocity of car 2 = 0 m/s

= Final velocity = 6.0 m/s

Putting values in above equation, we get:

Hence, the mass of the second car is 12666.7 kg

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.