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A particle moves along the positive bran...

A particle moves along the positive branch of the curve `y = (x^(2))/(2)` where `x = (t^(2))/(2),x` and y are measured in metres and t in second. At `t = 2s`, the velocity of the particle is

A

`2hati - 4hatj`

B

`2hati + 4hatj`

C

`4hatj+ 2hatj`

D

` 4hati- 2hatj`

Text Solution

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The correct Answer is:
B
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AAKASH INSTITUTE-MOTION IN A PLANE-Assignement section -B Objective (one option is correct)
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  7. If the horizontal range of a projectile be a and the maximum height at...

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  9. A body is projected horizontally with a speed v(0) find the velocity o...

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  10. A particle is thrown with the speed u at an angle alpha with the horiz...

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  11. A projectile is thrown with an initial velocity (v(x)hati + v(y)hatj) ...

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  12. A particle is projected with a velocity of 30 m/s at an angle theta...

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  13. A projectile has same range for two angules of projection. If times of...

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  14. A particle is projected with velocity 50 m/s at an angle 60^(@) with...

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  15. A projectile is fired to have maximum range 500 m. Maximum height atta...

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  16. A particle projected at some angle with velocity 50 m/s crosses a 20 m...

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  17. Two paper screens A and B are separated by a distance of 100m. A bulle...

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  18. A stone is thrown from the top of a tower at an angle of 30^(@) above...

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