Physics · Vector Calculus
If the magnitude of a differentiable vector function |p̅(s)| is a non-zero constant, then the direction of its derivative dp̅/ds is always:
- 1oriented in an arbitrary varying direction
- 2making an acute angle with p̅(s)
- 3parallel to the direction of p̅(s)
- 4perpendicular to the direction of p̅(s)✓
Correct answer
perpendicular to the direction of p̅(s)
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