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A rectangular plank of mass m(1) and hei...

A rectangular plank of mass `m_(1)` and height 'a' is on a horizontal surface. On the top of it another rectangular plank of mass `m_(2)` and height 'b' is placed. Find the potential energy of the system ?
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Total potential energy of system `U = U_(1) + U_(2)`
`= m_(1)g (a)/(2) + m_(2)g(a + (b)/2)`
` = [((m_(1))/(2) + m_(2))a + m_(2) ((b)/(2))]g`
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NARAYNA-WORK , ENERGY & POWER -EXERCISE IV
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  8. A projectile is fixed on a horizontal ground. Coefficient of restituti...

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  9. A ball A of mass 3 m is placed at a distance d from the wall on a smoo...

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  10. Figure given below shows the variation of potential energy function U(...

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  11. A particles moves along a circle of a fixed radius with a variable acc...

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  12. A particle is moving along a circle of fixed radius such thta the powe...

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  13. Two blocks having masses 8 kg and 16 kg are connected to the two ends ...

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  14. Figure shows a spring fixed at the bottom end of an incline of inclina...

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  15. A heavy flexible uniform chain of length pi r and mass lambda pi r lie...

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  16. A body slides without friction from a height H = 60 cm and then loops ...

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  17. A heavy particle hanging from a fixed point by a light inextensible st...

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  18. A cricket ball of mass 150 g moving with a speed of 123 km/h hits at t...

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  19. n elastic balls are placed at rest on a smooth horizontal plane which ...

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  21. A hose pipe has a diameter of 2.5 cm and is required to direct a jet o...

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