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A small sphere is projected with a veloc...

A small sphere is projected with a velocity of `3 ms^-1` in a direction `60^@` from the horizontal y - axis, on the smooth inclined plane (Fig. 5.197). The motion of sphere takes place in the x - y plane. Calculate the magnitude `v` of its velocity after `2 s`.
.

A

20m/s

B

15 m/s

C

`10sqrt3 m//s`

D

10 m/s

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-MOTION IN A PLANE-Assignement section -B Objective (one option is correct)
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  4. A particle is thrown with a speed is at an angle theta with the horizo...

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  5. A projectile is thrown with an initial velocity of (a hati +b hatj) ms...

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

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

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

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  9. A particle P is projected with velocity u1 at an angle of 30^@ with th...

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

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

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

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

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  14. A level flight olane flying at an altitude of 1024 ft with a speed of ...

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  15. A particle is projected from the bottom of an inclined plane of inclin...

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  16. If time taken by the projectile to reach B is T, then AB is equal to

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  17. A small sphere is projected with a velocity of 3 ms^-1 in a direction ...

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  18. A man desires to swim across the river in shortest time. The velcoity ...

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  19. Two cars A and B cross a point P with velocities 10m//s and 15m//s. Af...

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