Objective type SAT problems help
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A particle moves 80 cm South in 0.12 seconds and then 60 cm West in 0.08 seconds. What is the magnitude of the average velocity of the particle?
A) 700 cm/s
B) 1417 cm/s
C) 500 cm/s
D) 250 cm/s
E) 709 cm/s
When a car’s speed changes from 20 m/s to 40 m/s, its kinetic energy
A) stays the same
B) is doubled
C) is halved
D) is tripled
E) is quadrupled
Vectors u and v have magnitudes of 15 and 7 units respectively. What is the possible highest value of the magnitude of the vector 3u – 2v?
A) 31 units
B) 45 units
C) 66 units
D) 59 units
E) 8 units
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