Question

Initially two gliders are traveling towards each other. The blue glider is traveling to the right at 5.3 cm/s. the red glider is traveling to the left at an unknown speed. The two gliders collide. After the collision, the blue glider traveling to the right at 1.3 cm/s, and the red glider is traveling to the right at 3.2 cm/s. The blue glide has a mass of 602 g, and the red glider has a mass of 173g. What was the initial speed of the glider?

Answer #1

**SOLUTION**

**According to conservation of
linear momentum
we have:**

**therefore:**

**Isolating
from equation (2) we get:**

**Where:**

**
is the initial speed of red glider (before collision).**

**
is the mass of red glider.**

**
is the mass of blue glider.**

**
is the initial speed of blue glider (before collision)**

**
is the final speed of blue glider (after collision)**

**
is the final speed of red glider (after collision)**

**Now, replacing data given
values into equation (3) we get:**

**Solving we
obtain:**

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