Two ice skaters suddenly push off against one another starting from a stationary position. The 45-kg skater acquires a speed of 0.375 m/s relative to the ice. What speed does the 60-kg

The speed is

Explanation:

From the question we are told that

   The mass of the first skater is

    The final speed of the first skater is

    The mass of the second skater is

According to the principle of linear momentum conservation

Here  

Since they they started from a stationary position

So

While  

substituting values

So  

=>    

the first, second, and fifth options

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s