Question
Establish the formula for work in isothermal process.
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Answer
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- To slide the block up the incline? What will be the speed of the block when it reaches the ground.
- It falls off the incline and drops vertically on the ground.
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Two small balls A and B, each of mass m, are joined rigidly to the ends of a light rod of lengh L (figure). The system translates on a frictionless horizontal surface with a velocity vo in a direction perpendicular to the rod. A particle P of mass m kept at rest on the surface sticks to the ball A as the ball collides with it. Find:
[Hint: The light rod will exert a force on the ball B only along its length.]
- The linear speeds of the balls A and B after the collision.
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[Hint: The light rod will exert a force on the ball B only along its length.]
A cord of negligible mass is wound round the rim of a fly wheel of mass $20 \ kg$ and radius $20 \ cm$. A steady pull of $25 N$ is applied on the cord as shown in Fig. $6.31$. The flywheel is mounted on a horizontal axle with frictionless bearings.
$(a)$ Compute the angular acceleration of the wheel.
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$(c)$ Find also the kinetic energy of the wheel at this point. Assume that the wheel starts from rest.
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$(b)$ Find the work done by the pull, when $2m$ of the cord is unwound.
$(c)$ Find also the kinetic energy of the wheel at this point. Assume that the wheel starts from rest.
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What is adiabatic process? Establish the equation of state for this.
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