1.

In the “Collision Lab” simulation, begin with Ball 1 with mass 1 kg with initial velocity 1 m/s and Ball 2 with mass 1.5 kg initially at rest. What are the velocities of Ball 1 and Ball 2 after an elastic collision takes place?

Ball 1: -0.5 m/s, Ball 2: 0.5 m/s

Ball 1: 1.0 m/s, Ball 2: 1.0 m/s

Ball 1: 0.2 m/s, Ball 2: -0.8 m/s

Ball 1: 0.5 m/s, Ball 2: 0.5 m/s

Ball 1: -0.2 m/s, Ball 2: 0.8 m/s

2. True or false: In the “Buoyancy” simulation, a 5 kg block of wood will be more submerged in water than oil. Water is denser than oil.