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  1. R

    thrust is a net force acting perpendicular to any surface....?

    but how it is a net force? plese explain.... thnx in advance
  2. R

    How acceleration has direction?

    i know it is vector but if we leave this aside then how can wr say that is a vector quantity? II part- Suppose an object is moving on an inclined plane from u-10 to v-15 in two sec . It means there is acceletation , here its direction of motion is not changing but its speed is changing (how)?
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