If the magnitude of the sum of two non-zero vectors is equal to the magnitude of their difference, then which one of the following is correct ? A) The vectors is parallel B)The vectors is perpendicular C)The vectors is antiparallel D)The vectors must be unit vectors
If for two non-zero vectors a, b : โฃa+bโฃ=โฃaโbโฃ then angle between them is A) 0 degree B)45 degree C) 60 degree D) 90 degree
If for two non-zero vectors a, b : โฃa+bโฃ=โฃa|=|bโฃ then angle between them is A) 0 degree B)60 degree C) 90 degree D) 120 degree
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6) In a billiards game, one player hits the cue ball towards another ball (which is at rest). The cue ball has a mass of 0.1kg and hits the other ball with a velocity of 2m/s. If the collision is completely elastic and the cue ball travels with a velocity of 0.8m/s after the collision, what is the velocity and mass of the other ball? A) 2.8m/s, 0.043kg B) 2.2m/s, 0.13kg c) 4.0m/s, 0.028kg D) 3.1m/s, 0.094kg
7) A 4kg model train completes a circle of radius 1m in 7s. which of the following correct about the angular momentum. A) L= 4.135 kgm2/s B) L=2.227 kgm2/s C) L=3.588 kgm2/s D) L=1.165 kgm2/s