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A particle moves along X-axis in such a ...

A particle moves along X-axis in such a way that its coordinate X varies with time t according to the equation `x = (2-5t +6t^(2))m`. The initial velocity of the particle is

A

`5 m//s , 12 m//s^(2)`

B

`- 12 m//s , - 5 m//s ""^(2)`

C

`12 , - 5 m//s^(2)`

D

`- 5 m//s, 12 m//s ^(2)`

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The correct Answer is:
D
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MOTION-ONE DIMENSION MOTION-EXERCSE -1 (Section - A : Distance, Displacement, Velocity and Acceleration, Equation of Motion )
  1. A body moves along the sides AB, BC and CD of a square of side 10 mete...

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  2. A body covers half the distance with a velocity 10 m/ s and remaining ...

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  3. A particle moves along X-axis in such a way that its coordinate X vari...

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  4. The position of a body with respect to time is given by x = 4t^(3) – 6...

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  5. A car travels along a straight line for first half time with speed 40 ...

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  6. A truck travelling due north at 20 m/s turns east and travels at the s...

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  7. A motor car covers 1//3^(rd) part of total distance with v(1) = 10 ...

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  8. A particle travels A to M along a straight line with a velocity of 8 m...

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  9. At an instasnt t the coordinates of a particles are x=at^(2), y=bt^(2)...

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  10. The displacement time graph of a moving particle is shown below T...

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  11. Figure shows four paths along which objects move from a starting poi...

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  12. Figure shows the path followed by a particle. Its velocity is shown at...

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  13. A body starting from rest and has uniform acceleration 8 m//s^(2) . ...

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  14. A car accelerates from rest at a constant rate alpha for some time, af...

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  15. The distance x travelled by the car in above problem in time t is give...

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  16. A train, travelling at 20 km//hr is approaching a platform. A bird is ...

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  17. A body moves with uniform velocity of u = 7 m/s from t = 0 to t = 1.5 ...

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  18. A driver applies the brakes on seeing traffic signal 400m ahead. At th...

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  19. The position of a particle is expressed as vecr = ( 4t^(2) hati + 2th...

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  20. The position of a particel is expressed as vecr = ( 4t^(2)hati + 2tha...

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