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- So far we were considering rectilinear motion of an object.
- So far we were considering rectilinear motion of an object.
- The direction of motion of the object was always along one straight line.
- The direction of motion of the object was always along one straight line.
- Now we will consider the motion of an object in two dimensions, i.e., along a plane.
- Now we will consider the motion of an object in two dimensions, i.e., along a plane.
- Here, the direction of the force acting on an object will not be in the same line as its initial velocity.
- Here, the direction of the force acting on an object will not be in the same line as its initial velocity.
- Thus, the velocity and acceleration will have different directions.
- Thus, the velocity and acceleration will have different directions.
- For this reason we have to use vector equations.
- For this reason we have to use vector equations.
- The definitions of various terms given in section 2.2 will remain valid except that the magnitude of the average velocity and the value of average speed will be different as the magnitude of the displacement need not be equal to the path length.
- The definitions of various terms given in section 2.2 will remain valid except that the magnitude of the average velocity and the value of average speed will be different as the magnitude of the displacement need not be equal to the path length.
- For example, if a particle travels along a circle and comes back to its original position, its displacement will be zero but the path length will be equal to the circumference of the circle.
- For example, if a particle travels along a circle and comes back to its original position, its displacement will be zero but the path length will be equal to the circumference of the circle.
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