Question

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?

Asked in RRB JE CBT 1 · 2025
Energy · Physics
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PhysicsWork Power EnergyEnergyRRB JE CBT 12025
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Gravitational potential energy near Earth is mgh.

Correct AnswerCorrect option for this question
Option B — Kinetic energy depends on the square of speed, not just on power supplied.

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Questions Asked from Kinetic & Potential Energy: Meaning & Formulas in Previous Exams

See how often Kinetic & Potential Energy: Meaning & Formulas has appeared in previous-year questions across major government exams.

High Exam Frequency
11UPSC Questions Asked in These Years:2010, 2011, 2012, 2014, 2017, 2020, 2021, 2022, 2023, 2024, 2026
9SSC Questions Asked in These Years:2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
7Railways Questions Asked in These Years:2016, 2018, 2021, 2022, 2024, 2025, 2026
15State PSC Questions Asked in These Years:2002, 2004, 2012, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
Kinetic & Potential Energy: Meaning & Formulas has appeared in 42 previous-year exam questions, most frequently in State PSC, UPSC and SSC.
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