Item 9 Question 1 Last week, you finished Level 2 of a video game in 32 minutes. Today, you finish Level 2 in 28 minutes. Is the percent of change an increase or a decrease? Increase Decrease Question 2 What is your percent of change? %

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?