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The kinetic energy of an object depends ...

The kinetic energy of an object depends on the frame of reference in which its motion is measured. Give an example to illustrate this point.

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As you ride an express subway train, a backpack at your feet has no kinetic energy as meausured by you since according to you, the backpack is not moving. In the frame of reference of someone on the side of the tracks as the train rolls by the backpack is moving and has mass, and thus has kinetic energy.
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CENGAGE PHYSICS ENGLISH-WORK, POWER & ENERGY-Exercise 8.2
  1. A particle of mass 0.5kg travels in a straight line with velocity v=ax...

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  2. Can kinetic energy be negative? Explain.

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  3. The kinetic energy of an object depends on the frame of reference in w...

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  4. You are reshelving books in a library. You lift a book from the floor ...

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  5. What is the reason that we burn out our body fat only when we walk bri...

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  6. Figure shows three paths connecting points a and b, A single force F d...

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  7. The potential energy of a conservative force field is given by U=ax^...

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  8. A particle moves in x-y plane in figure under the influence of a frict...

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  9. A single conservative force acting on a particle varies as F=(-Ax+Bx^2...

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  10. A potential energy function for a two-dimensional force is the form U=...

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  11. For the potential energy curve shown in figure. (a) Determine whethe...

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  12. Is it possible exert a force which does work on a body without changin...

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  13. The kinetic friction force acting on a sliding body moving in a straig...

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  14. A single conservative force acting on a particle varies as vecF=(-Ax+B...

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  15. A block of mass m is placed at the bottom of a massless smooth wedge w...

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  16. A particle is projected in gravity with a speed v0. Using W-E theorem,...

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  17. A block is released from rest from a height h=5m. After travelling thr...

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  18. A block of mass m is connected with a rigid wall by light spring of st...

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  19. Two blocks of masses m1 and m2 inter connected by a spring of stiffnes...

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  20. A ball of mass m is thrown in air with speed v(1) from a height h(1) a...

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