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A particle has an initial velocity 3 hat...

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

A

10 units

B

`7sqrt2` units

C

7 units

D

8.5 units

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-RIVISION EXERCISE-MOTION IN A PLANE (MOTION IN A PLANE)
  1. Two particles having position vectors vecr1 = (3hati + 5hatj)m and ve...

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  2. Four persons A,B,C and D intially at the corners of a square of side o...

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  3. A particle moving with a velocity equal to 0.4 ms^(-1) is subjected to...

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  4. Velocity of particle at time t = 0 is 2ms^(-1) . A constant accelerati...

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  5. A vertical disc has three grooves directed along chords AB, AC and AD....

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

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  7. Three particles A, B & C start from the origin at the same time, A wit...

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  8. A particle starts from the origin at t=0s with a velocity of 10.0 hatj...

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  9. An aeroplane flies along a straight line from A to B with a speed v0 ...

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  10. The distance between two moving particles P and Q at any time is a. If...

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  11. Two particles having position vectors vecr1 = (3hati + 5hatj)m and ve...

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  12. Four persons A,B,C and D intially at the corners of a square of side o...

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    |

  13. A particle moving with a velocity equal to 0.4 ms^(-1) is subjected to...

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  14. Velocity of particle at time t = 0 is 2ms^(-1) . A constant accelerati...

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    |

  15. A vertical disc has three grooves directed along chords AB, AC and AD....

    Text Solution

    |

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

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    |

  17. Three particles A, B & C start from the origin at the same time, A wit...

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  18. A particle starts from the origin at t=0s with a velocity of 10.0 hatj...

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    |

  19. An aeroplane flies along a straight line from A to B with a speed v0 ...

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    |

  20. The distance between two moving particles P and Q at any time is a. If...

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    |