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A mouse jumps off from the 15^("th") flo...

A mouse jumps off from the `15^("th")` floor of a high-rise building and lands 12 m from the building. Assume that each floor is of 3m height. The horizontal speed with which the mouse jumps is closest to :

A

0

B

5 kmph

C

10 kmph

D

15 kmph

Text Solution

Verified by Experts

The correct Answer is:
D
Time of fall = `sqrt((2h)/g)=sqrt((2xx45)/10)`
t = 3 sec
horizontal distance = horizontal velocity `xx` time
`12=vxx3`
v = 4 m/s
=`4xx18/5` km/hr
v = 14.4 km/hr
`v~~15` km/hr
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Knowledge Check

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