Students investigate collisions using two gliders on a level, frictionless air track. Glider 1, of mass \( m_1 \), is equipped with a force sensor that has a soft spring bumper. Glider 2, of unknown mass \( m_2 \), is initially at rest. Glider 1 is launched toward Glider 2. The software connected to the force sensor records the force \( F(t) \) exerted on Glider 1 by Glider 2 during the collision.