- Archie has a mass of 75 kg and a speed of 8.0 m/s. Determine his momentum and kinetic energy. 2 -Find the energy and momentum of a photon A) of red light of wavelength 689 nm. B) of 1.51015 Hz UV photon. C) of a green laser beam of power 1 mW fired for 10 s of wavelength of 550 nm (get photon energy, beam energy, # of photons, photon momentum, beam momentum - in that order) 3 - Veronica has a mass of 60 kg and an initial speed of 5.0 m/s. She slows down with an impulse of -100 Ns. Find her final speed. ---3 4 - Jughead has an initial speed of 2.5 m/s and a final speed of 5.5 m/s after experiencing an impulse of 240 Ns. Determine his mass. 5 - Reggie hits a 150 g baseball with an overall force of 7 369 N [E 30o U] {his force and the force of gravity combined}. The collision takes 1.25 ms. The initial velocity of the ball is 144 km/h [W]. Determine the final velocity of the ball. 6 - Betty has a mass of 60 kg and is standing at rest on a raft of 20 kg moving at 5.0 m/s [E]. She starts walking East at 2.0 m/s relative to the raft. Determine the new velocity of the raft relative to the river bank. ---6 7 - Moose the astronaut with a backpack have a mass 150 kg. He is on a spacewalk and is stranded 10 m away from the space station hatch. He removes and throws his 25 kg pack away from the space station with 500 N of force for 0.50 s. How long will it take Moose to reach the hatch? 8. A 50 kg figure skater moving West at 18 m/s and collides with a 90 kg hockey player moving East at 12 m/s. They collide perfectly elastically - determine their final velocities.