When two vectors `vecA` and `vecB` of magnitude a and b are added, the magnitude of the resultant vector is always

Options

A. Equal to (a + b)
B. Less than (a + b)
C. Greater then
D. Not greater than (a+ b)

Explanation

`u=10m//s`
Height covered above the top of tower ,`h=v^2/(2g)`
`h=(10)^2/(2xx10)=5m` Time taken to cover a distance of 5m is,
`h_1=1/2g t^2`
`implies 5=1/2xx10xxt^2`
`impliest^2=1`
`:.t=1s`
`:.` After 2s time difference =`2xx1 s=2s.`