NCERT · Class 11 · Physics · Motion in a Straight LineA car travels the first half of a distance with a speed of 40 km/h and the second half with a speed of 60 km/h. The average speed of the car is:
Step-by-Step Solution
Average speed for equal distances = 2v1v2 / (v1 + v2) = (2 * 40 * 60) / (40 + 60) = 4800 / 100 = 48 km/h.
Detailed Options Breakdown
Option : 50 km/h
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Motion in a Straight Line.
Option 1: 48 km/h (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: 45 km/h
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Motion in a Straight Line.
Option 3: 55 km/h
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Motion in a Straight Line.
💡 Study Guide: This question tests core syllabus concepts from Motion in a Straight Line. For formulas, key summaries, and mock exam reference guides, read the full Motion in a Straight Line Revision Notes.