Diver Propulsion
physics quiz the person giving maximum correct answers gets a suprise gift quiz no.1 part1?
1)Due to continental drift,the NorthAmerican and European continents are drifting apart at an average speed of about 3.0 cm per year. At this speed, how long (in years) will it take for them to drift apart by another 1.8 km? (2sf)
2) NASA has developed Deep-Space 1 (DS-1), a spacecraft that is scheduled to rendezvous with the asteroid named 1992 KD (which orbits the sun millions of miles from the earth). The propulsion system of DS-1 works by ejecting high-speed argon ions out of the rear of the engine. The engine slowly increases the velocity of DS-1 by about + 11.8 m s-1 per day. How much time (in days) will it take to increase the velocity of DS-1 by + 2690 m/s.(3sf)
3)A sky diver, with parachute unopened, falls 598 m in 11.2 s. Then she opens her parachute and falls another 297 m in 123.5 s. What is her average velocity for the entire fall? (3sf)
1) 1.8 km / 3.0 cm = 1800 m / 0.03 m = 6.0*10^4 years
2) 2690 / 11.8 = 228 days
3) total distance / total time = (598 + 297)/(11.2 + 123.5) = 895 / 134.7 = 6.64 m/s
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