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Two particles are projected with speed 4...

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

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 (for time interval `0 lt t lt 0.36s)` is constant and has megnitude 1.4 m//s.

Text Solution

Verified by Experts

The correct Answer is:
A, D
`v_(1)=4 cos 53^(@) hat(i) +4 sin 53^(@) hat(j)=(12)/(5) hat(i) +(16)/(5) hat(j)`
`v_(2)=3 cos 37^(@) hat(i) +3 sin 37^(@) hat(j)=(12)/(5) hat(i)+(9)/(5) hat (j)`
`v_(12) = (7)/(5) hat(j) = 1.4 hat(j)`
Relative velocity in horizontal direction is zero.
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