Question

(i) Is the product of two vectors always a vector ? give example

(ii) Plot a graph between kinetic energy and potential energy of a freely falling body and its height above the ground .

(iii) What is the magnitude and direction of the net force acting on a drop of rain falling down with constant speed ?
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Answer 1

Explanation:

Here, the torque itself is formed in a new direction depending upon the direction of the radius vector and the force vector completely (no components). That is why it is a vector. (this is an example of cross product). The product of two vectors is not necessarily a vector