Grade 12Mechanics

a BALL IS THROWN UPWARD N IT RETURNS TO GROUND DESCRIBING A PARABOLIC PATH. WHICH OF THE FOLLOWING REMAINS CONSTANT AND WHY PLS EXPLAIN
a) KE OF BALL
B) SPEED OF BALL
C) HROZONTAL COMPONENT OF VELOCITY
D ) VERTICAL COMPONENT OF VELOCITY

SHOBHIT GUPTA

16 Years agoGrade 12

4 Answers

Ramesh V

16 Years ago

Dear friend,

only the horizontal component remains constant as as there is no component of acc. in horizontal direction.

The g aaceleration due to gravity acts downwords hence there is no accln in horizontal direction, the velocity changes in vertical direction as goes up and down while in horizontal it goes only forward.

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shanky shanky

16 Years ago

C-it si the correct one .

as vert. compo. of velo. i.e.=v sinA is a variable compo.

and only Hz. compo. i.e.v cosA will be constant.

Rajlaxmi das

8 Years ago

Answer c is correct as horizontal component of the parabolic path remains constant throughout the projection

Kushagra Madhukar

6 Years ago

Dear student,

Please find the explanation to the problem.

As there is no acceleration in x direction the velocity along it remains unchanged while the velocity along y direction changes due to acceleration of gravity(g) along y direction due to which speed and KE also varies.

Therefore, option c) is correct.

Hope it helps.

Thanks and regards,

Kushagra