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STATEMENT-1: Two spheres undergo a perfe...

STATEMENT`-1:` Two spheres undergo a perfectly elastic collision. The kinetic energy of system of both spheres is always constant. [There is no external force on system of both spheres].
STATEMENT `-2:` If net external force on a system is zero, the velocity of centre of mass remains constant.

A

Statement-1 is true, Statement-2: is true, Statement-2 is a correct explanation for Statement-1.

B

Statement-1 is true, Statement-2: is true, Statement-2 is NOT a correct explanation for Statement-1.

C

Statement-1 is true but statement-2 is false

D

Statement-1 is false, Statement-2 is true

Text Solution

Verified by Experts

The correct Answer is:
D
During collision KE of system is not constant, hence statement-1 is false.
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RESONANCE ENGLISH-PART TEST 1-Exercise
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  2. Statetment-1: A solid sphere and a hollow spheres of same radius and s...

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  3. A 1 kg block is being pushed against a wall by a force F=75N as shown...

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  4. A forceF=(3thati + 5hatj)N acts on a body due to which its displacemen...

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  5. Particle 'A' moves with speed 10 m/s in a frictionless circular fixed ...

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  6. A metallic wire of diameter d is lying horizontally on the surface of ...

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  7. Two constant horizontal force F1 and F2 are acting on blocks A and B. ...

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  8. If the energy ( E) ,velocity (v) and force (F) be taken as fundamental...

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  9. STATEMENT-1: Two spheres undergo a perfectly elastic collision. The ki...

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  10. A shere of mass m , moving with velocity V, enters a hanging bag of sa...

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  11. Each point mass 2 kg is connected at the end of each uniform rod of le...

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  12. Reading of spring balance S1 and S2 (Pulley are ideal)

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  13. A wheel of the radius 0. 4 m can rotate freely about its axis. A strin...

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  14. A small ball of mass 1kg strikes a wedge of mass 4kg horizontally with...

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  15. A lift is moving in upward direction with speed 20m//s and having acce...

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  16. A body of mass m is released from a height h on a smooth inclined plan...

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  17. A ball of mass m is fastened to a string. The ball swings in a vertica...

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  18. If y=x-x^2 is the path of a projectile, then which of following is inc...

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  19. Value of theta is increased gradually from theta = 0. At theta = tan^(...

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  20. In the fig. (a) half of the meter scale is made of wood while the othe...

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