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An explosion blows a rock into three pie...

An explosion blows a rock into three pieces Two pieces whose masses are 200 kg and 100 kg go off at `90^(@)` to eachother with a velocity of `8 m//s ` and ` 12 m//s ` respectively If the third piece flies off with a velocity of` 25 m//s` then calculate the mass of this piece and indicate the direction of flight of this piece in a diagram.

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SL ARORA-Laws of Motion-Exercise
  1. An explosion blows a rock into three pieces Two pieces whose masses ar...

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  2. A force acts for 10 s on a body of mass 10 kg after which the force ce...

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  3. A truck starts from rest and rolls down a hill with a constant acceler...

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  4. A force of 5N gives a mass m(1), an acceleration of 8 m//s^(2), and a ...

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  5. In an X-ray machine an electron is subjected to a force of 10^(-23) N ...

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  6. A stone of mass 5kg falls from the top of a cliff 50m high and buries ...

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  7. A bullet of mass 100 gram moving with 20 m//s Strikes a wooden plank ...

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  8. A motor car running at the rate of 7ms^(1) can be stooped by applying ...

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  9. A force of 50N is inclined to the vertical at an angle of 30^(@) Find ...

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  10. A ship of mass 3xx10^7kg initially at rest, is pulled by a force of 5x...

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  11. A ballon has a mass of 5 g in air. The air escapes from the ballon at ...

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  12. A cricket ball of mass 150 kg is moving with a velocity of 12 m//s and...

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  13. A hammer weighing 1 kg moving with the speed of 10ms^(-1) strikes the ...

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  14. A hammer weighing 1 kg moving with the speed of 10ms^(-1) strikes the ...

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  15. A hammer weighing 1 kg moving with the speed of 10ms^(-1) strikes the ...

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  16. Two billiard balls of mass 50 g moving in oppositedirections with spee...

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  17. A machine gun has a mass of 20 kg . It fires 35 g bullets at the rate ...

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  18. A ball of mass 20 gram hits a wall at an angle of 45^(@) with a veloci...

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  19. A glass ball whose mass is 10 g falls from a height of 40 m and reboun...

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  20. A force acting on a body of mass 2 kg varies with time as shown in fig...

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  21. A force acting on a body of mass 2 kg varies with time as shown in fig...

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