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ramyani chakrabarty (3105)

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A car is accelerating forward with an an accelaration , say, a . Suppose a body of mass is at rest in the car.
Now from the car frame ( inside the car--non inertial frame ) an observer notices the body to be at rest.
From the ground frame ( inertial frame ) another observer notices the body to be accelarating with accln a.

Now inside the car if we want to apply the equn F = ma on the body , we must consider an imaginary force ma to act upon the body in a dirn opposite to car's motion so that the net force acting on the body is ma + ( --ma) = 0 and to conclude the body is at rest ( which is fact).

NIT silchar electrical engineering

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