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Assertion: In projectile motion horizont...

Assertion: In projectile motion horizontal velocity remains same but vertical velocity continously change and particle strikes the ground with same vertical velocity with which the particle was thrwon in vertical direction.

A

If both assertion `&` Reason are True `&` the Reason is a corrrect explanation of the Asserion.

B

If both Assertion `&` Reason are True but Reason is not correct explanation of the Assertion.

C

If Assertion is Trie but the Reason is False.

D

If both Assertion `&` Reason are false

Text Solution

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The correct Answer is:
D
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STATEMENT-1: A particle si projected at an angle theta ( lt 90) to horizontal, with a velcotiy u . When particle strikes the ground its speed is again u . STATEMENT-2: Velocity along horizontal direction remains same but velocity along vertical direction is changed. When particle strikes the ground, magnitude of final vertical velocity is equal to magnitude of initla vertical velocity.

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Projectile motion is a combination of two one-dimensional motion: one in horizontal and other in vertical direction. Motion in 2D means in a plane. Necessary condition for 2D motion is that the velocity vector is coplanar to the acceleration vector. In case of projectile motion, the angle between velocity and acceleration will be 0^@ltthetalt180^@ . During the projectile motion, the horizontal component of velocity ramains unchanged but the vertical component of velocity is time dependent. Now answer the following questions: A particle is projected from the origin in the x-y plane. The acceleration of particle in negative y-direction is alpha . If equation of path of the particle is y = ax - bx^2 , then initial velocity of the particle is

A particle is projected horizontally from a tower with velocity u towards east. Wind provides constant horizontal acceleration (g)/(2) towards west. If particle strikes the ground vertically the then :

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ALLEN-MOTION IN A PALNE-EXERCISE-3
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  2. Assertion: Rest of a body is a relative term. Reason: Motion of a bo...

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  3. Assertion: If a body moves on a straight line, magnitude of its displa...

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  4. Assertion: Separation between two bodies moving in the same direction ...

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  5. Assertion: To cross the river in minimum time swimmer should swimming ...

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  6. Assertion: A body moving with constant acceleration always travels equ...

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  7. Assertion: A body,whatever its motion, is always at rest in a frame of...

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  8. Assertion : A body droped from a given height and another body project...

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  9. Statement-I : A projectile is thrown with an initial velocity of (ahat...

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  10. Assertion: If the positon vector of a particle moving in space is give...

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  11. Assertion: In projectile motion, when horizontal range is n times the ...

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  12. Assertion: Path of projected ball becomes parabolic in gravitational f...

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  13. Assertion: In projectile motion, the acceleration is constant in both ...

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  14. Assertion: In projectile motion horizontal velocity remains same but v...

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  15. Assertion: In projectile motion, the vertical velocity of the particle...

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  16. Assertion: The path of one projectile as seen for another projectile i...

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  17. Assertion: In case of projectile motion, acceleration horizontal compo...

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  18. Assertion: In the projectile motion projected boyd behave just like a ...

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  19. Assertion: Projectile motion is uniformly accelerated motion. (Neglect...

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  20. Assertion: Horizontal range is same for angle of projection theta and...

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