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NEET2011PhysicsMotion in One DimensionActual

A body is moving with velocity 30 ~m / s towards east. After 10 ~s its velocity becomes 40 ~m / s towards north. The average acceleration of the body is

Options

  1. A7 ~m / s ^2
  2. B7 ~m / s ^2
  3. C5 ~m / s ^2
  4. D1 ~m / s ^2

Correct answer

C. 5 ~m / s ^2

Step-by-step solution

aligned & Average acceleration = Change in velocity Total time & aligned a & = | v _f- v _i | t & = 30^2+40^2 10 = 900+1600 10 & =5 ~ms ⁻² aligned aligned

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