Two particles are projected with speed `4m//s` and `3m//s` simultaneously from same point as shown in the figure. Then:

Options

A. Their relative velocity is along vertical direction
B. Their relative acceleration is non-zero and it is along vertical direction
C. They will hit the surface simultaneously
D. Their relative velocity is constant and has magnitude `1.4 m//s`

Answer

A, D

Explanation

`V_(rel_x)=0`
`V_(rel_y)=4sin 53^(@)-3sin 37^(@)`
`=1.4m//s`
`a_(rel_x)=0`
`a_(rel_y)=0`