(Someone help plz...) Gather data: Record the potential energy of the pendulum for each of the following sets of values for m, L, and g. Record the height (h) of the pendulum as well. (Because the pendulum’s pivot is 2 m above the ground, the height is equal to 2 meters – L meters.)

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?