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Question 29Asked in RRB JE CBT-1, 25 Feb 2026, Shift 3 (4:30 PM)

A student claims that two cars of equal mass, one moving at 40 km/h and another at 80

A student claims that two cars of equal mass, one moving at 40 km/h and another at 80 km/h, have the same kinetic energy if their engines provide the same power. What is the error in this reasoning?
  1. AThe cars have equal energy if the engines are identical.
  2. BKinetic energy depends on the square of speed, not just on power supplied.
  3. CPower supplied determines energy, regardless of speed.
  4. DBoth cars have equal kinetic energy since both cover the same distance.
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Correct answer: (B) Kinetic energy depends on the square of speed, not just on power supplied.

From RRB JE CBT-1 PYQ 25 Feb 2026, Shift 3 (4:30 PM)

This is question 29 of RRB JE CBT-1 PYQ 25 Feb 2026, Shift 3 (4:30 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.