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A particle has an initial velocity of 4 ...

A particle has an initial velocity of `4 hati +3 hatj` and an acceleration of `0.4 hati + 0.3 hatj`. Its speed after 10s is

A

` 7sqrt2 ` units

B

7 units

C

8.5 units

D

10 units .

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The correct Answer is:
A
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AAKASH INSTITUTE ENGLISH-MOTION IN A PLANE-Assignement section -A Objective (one option is correct)
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  2. A body move 6 m north, 8 m east and 10 m vertically upwards, the resul...

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  3. A particle has an initial velocity of 4 hati +3 hatj and an accelerati...

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  5. The resultant of two vectors makes an angle of 60^(@) with one vecto...

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  6. The position vector of an object at any time t is given by 3t^(2) hati...

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  7. A body lying initially at point (3,7) starts moving with a constant ac...

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  8. The initial position of an object at rest is given by 3 hati - 8 hatj....

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  9. If |vecP + vecQ|= | vecP| -|vecQ| , the angle between the vectors ve...

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  10. if |vecP + vecQ| = |vecP| + |vecQ| , the angle between the vectors ...

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  13. If |vecP + vecQ| = |vecP -vecQ| the angle between vecP and vecQ is

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  14. if vecP +vecQ = vecP -vecQ , then

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  15. At the topmost point of a projectile trajectory, its velocity and acce...

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  16. For angle of prijection of projectile at angle(45^(@)-theta) and (45^...

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  17. A cricket ball of mass m is hitted at the angle 45^(@) to the horizont...

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  18. The path of a projectile is

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  19. Two cars of masses m(1)" and" m(2) are moving in circles od radii r(1)...

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  20. Which of the following is not a projectile ?

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