CBSE · Class 9 · Science · MotionWhich of the following is a scalar quantity?
Step-by-Step Solution
Scalar quantities are those quantities that have magnitude only and no direction. Among the given options, speed has only magnitude (e.g., 40 km/h) and no specific direction, whereas displacement, velocity, and acceleration are vector quantities because they require both magnitude and direction to be completely specified.
Detailed Options Breakdown
Option : Displacement
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Motion.
Option 1: Velocity
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Motion.
Option 2: Speed (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 3: Acceleration
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Motion.
💡 Study Guide: This question tests core syllabus concepts from Motion. For formulas, key summaries, and mock exam reference guides, read the full Motion Revision Notes.