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Question

Two bodies were thrown simultaneously from the same point, one straight up, and the other, at an angle of 30o to the horizontal. The initial speed of each body is 20 ms−1. Neglecting air resistance, the distance between the bodies at t=1.2 later

A
20 m
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B
30 m
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C
24 m
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D
50 m
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Solution

The correct option is C 24 m
For vertically projected body,
y+1=ut0.5gt2=16.8 m
x1=0
For the projectile at 30 degrees,
Ux=ucosθ
Uy=usinθ
y2=Uyt0.5gt2=4.8 m
x2=Uxt

R=(y1y2)2+(x1x2)2=24

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