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NEET2010PhysicsMotion in Two DimensionsActual

A particle has initial velocity (3 i +4 j ) and has acceleration (0.1 i +0.3 j ) . Its speed after 10 ~s is

Options

  1. A7 unit
  2. B7 2 unit
  3. C8.5 unit
  4. D10 unit

Correct answer

B. 7 2 unit

Step-by-step solution

From first equation of motion aligned v & = u + at v & =3 i +4 j +10(0.4 i +0.3 j ) v & =7 i +7 j | v | & =7 2 aligned

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