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A rocket moves forward by pushing the su...

A rocket moves forward by pushing the surrounding air backwards.

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KEY CONCEPT: The rocket moves forward when the exhaust gases are thrown backward.
Here exhaust gases thrown backwards is action and rocket moving forward is reaction.
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TRUE/FALSE TYPE QUESTIONS: A rocket moves forward by pushing the surrounding air backward.

Does doubling the thrust of a rocket by doubling the rate of which mass is thrown backward double the final speed of the rocket? Why or why not.?

Assertion: A spinning cricket ball deviates from is trajectory as it moves through air. Reason: The ball is moving forward and relative to it the air is moving backward.

In the given circuit, the diode has a forward resistance of 8 Ω and infinite backward resistance. The value of R is :-

Statement-1: In a reversible endothemic reactiuon, E_(act) of forward reaction is higher than that of backward reaction. Statement-2: The threshold energy of forward reaction is more than that of backward reaction.

Assertion (A) : In a reversible endothermic reaction, E_("act") of the forward reaction is higher than that of the backward reaction Reason (R) : The threshold energy of the forward reaction is more than that of the backward reaction.

SUNIL BATRA (41 YEARS IITJEE PHYSICS)-LAWS OF MOTION-JEE Main And Advanced
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  2. A uniform rod of length L and density rho is being pulled along a smoo...

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  3. A rocket moves forward by pushing the surrounding air backwards.

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  5. A simple pendulum with a bob of mass m swings with an angular amplitud...

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  6. The pulley arrangements of Figs. (a) and (b) are identical. The mass o...

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

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  13. A string of negligible mass going over a clamped pulley of mass m supp...

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  15. A block P of mass m is placed on horizontal frictionless plane. A seco...

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  16. The string between blocks of mass m and 2m is massless and inextensibl...

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  17. Two particles of mass m each are tied at the ends of a light string of...

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  19. A block of base 10 cm xx 10 cm and height 15 cm is kept on an inclined...

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