Name: Class: Date: 6. Although it cannot sustain its top speed for more than 8.65 s, the cheetah can run a distance of 274 m during that time. If a cheetah with a mass of 50.0 kg is kg (m/s) moving north at its top speed, what is its momentum? 7. The high-speed 300-series Shinkansen trains of Japan consist of 16 aluminum cars with a combined mass of 7.10 x 10 kg. The reduction in mass from the 100-series trains enables the 300-series trains to reach a top speed of 270 km/h. What is the magnitude of a 300-series train's momentum at its top speed? kg (m/s) 8. The largest species of hummingbird is the Patagonia gigas, or the Giant Hummingbird of the Andes. This bird has a length of 21 cm and can fly with a speed of up to 50.0 km/h. Suppose one of these hummingbirds flies at this top speed. If the magnitude of its momentum is 0.278 kg. m/s, what is the hummingbird's mass? kg 9. A hovercraft, or air-cushion vehicle, glides on a cushion of air, allowing it to travel with equal ease on land or water. The first commercial hovercraft to cross the English Channel, the V. A-3, had an average velocity of 96 km/h to the southeast. Its average momentum was 4.8 x 10 kg-m/s to the southeast. What was the mass of the V. A-3? kg 10. The brightest, hottest, and most massive stars (over 10 times as massive as the sun) are the brilliant blue stars designated as spectral class O. If a class O star moves with a speed of 255 km/s and has a momentum of 8.62 103 kg-m/s, what is the star's mass? kg 36