Physics
A body of mass 5 kg accelerates from 12 m/s to 20 m/s in 4 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).

40
20
10
80

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Physics
Solids have definite shapes.This is because

The forces of adhesion are less
The forces of cohesion are very large
The forces of adhesion are large
The forces of cohesion of the molecules within are very much less in them

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