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A ball is thrown horizontally from a poi...

A ball is thrown horizontally from a point O with speed 20 m/s as shown. Ball strikes the incline along normal after two seconds
The displacement of ball in two seconds will be:

A

2m

B

`2 sqrt2m`

C

`2 sqrt5 m`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
D
As particle moving Horizontal initially `S_(H)=20 xx 2=40m, S_(v)=1/2 gt^(2)=1/2 xx 10 xx 4=20`
Displacement `|S|=sqrt(S_(H^(2))+S_(V^(2))=sqrt((20)^(2)+(20 xx 2)^(2))=20sqrt5m`
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