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 answer is a 3.8cm

explanation:

wavelength divides in half and speed stays the same.