mission physics

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with wat minimum speed shud a motorbike be moving on the road to safely cross a 11.7ft wide ditch with approach roads at an angle of 15 degree with the horizontal.assume length of bike is 5 ft and it leaves the road as soon as front part runs out of approach of road.

with reference to HCverma kinematics-pg-53-q.36

#Physics #Mechanics

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8 Answers

1357

Manish Shankar ·2009-04-11 21:30:52

Use R=u²sin2Î¸/g

what will be the range here

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JOHNCENA IS BACK ·2009-04-11 21:33:12

i took range as (5 cos 15+11.7+5cos 15)ft

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JOHNCENA IS BACK ·2009-04-11 21:55:08

sir is range taken by me correct!!!

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1357

Manish Shankar ·2009-04-11 22:13:51

why you have written 5cos15 two times

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JOHNCENA IS BACK ·2009-04-11 22:15:31

then wat shud be range.

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Anuj ·2009-04-11 22:21:17

ACC TO ME IT SHUD BE 11.7+5=16.7 FT

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virang1 Jhaveri ·2009-04-11 23:06:52

yes 16.5
Therefore
334 = u²
u = 18.27

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Anuj ·2009-04-11 23:18:28

yes i too, got the same

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