Particles A and B are moving along a plane. Their velocities are represented by vectors vec(a) and vec(b), respectively. Which option best describes the meaning of the following statement? || vec(a)|| || vec(b)|| Choose 1 answer: (A) Particle A is heavier than particle B. (B) Particle A's speed is greater than particle B's speed. (C) Particle A's movement creates a greater counterclockwise angle with the eastward direction than particle B's movement.

Question

Particles  A and  B are moving along a plane. Their velocities are represented by vectors  vec(a) and  vec(b), respectively. Which option best describes the meaning of the following statement?  || vec(a)|| > || vec(b)|| Choose 1 answer: (A) Particle  A is heavier than particle B. (B) Particle A's speed is greater than particle B's speed. (C) Particle A's movement creates a greater counterclockwise angle with the eastward direction than particle B's movement.

Bytelearn · Accepted Answer

Magnitude of Vectors: The statement || vec(a)|| > || vec(b)|| is comparing the magnitudes of two vectors, vec(a) and vec(b). The magnitude of a vector represents the length of the vector, which in the context of velocity vectors, corresponds to the speed of the particle. Therefore, this statement is comparing the speeds of particles A and B.Interpretation of Option (A): Option (A) suggests that particle A is heavier than particle B. However, the statement given is about the magnitudes of velocity vectors and does not provide any information about the mass or weight of the particles. Therefore, option (A) is not the correct interpretation of the statement.Interpretation of Option (B): Option (B) states that particle A's speed is greater than particle B's speed. This interpretation is consistent with the meaning of the magnitudes of velocity vectors. Since || vec(a)|| represents the speed of particle A and || vec(b)|| represents the speed of particle B, the statement || vec(a)|| > || vec(b)|| indeed means that particle A's speed is greater than particle B's speed.Interpretation of Option (C): Option (C) suggests that particle A's movement creates a greater counterclockwise angle with the eastward direction than particle B's movement. The statement given does not provide any information about the direction of the velocities or their angles with respect to any direction. It only compares the magnitudes (speeds) of the velocities. Therefore, option (C) is not the correct interpretation of the statement.

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