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A projectile is fired horizontally with a velocity of 98 m/s from 490 m high . find
1) time taken to reach ground
2) the distance of target from the hill
3)the velocity with which the body strikes the ground.

#Physics #General Physics

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Subhomoy Bakshi ·2010-05-11 14:48:18

1) same time as a body dropped from rest!!!

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Subhomoy Bakshi ·2010-05-11 14:50:26

1) t=√2X4909.8=10s

2) horizontal dist travelled = V_xXt=980 m

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Subhomoy Bakshi ·2010-05-11 14:52:32

V_y=gt=98 m/s
V_x=98 m/s

V=98√2 m/s

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inovate ·2010-05-11 15:01:47

earth is revolving around sun . if the distance of the earth from the sun is reduced to 1/4th of the present distance , then the present day length reduced to
1 1/4
2 1/2
3 1/8
4 1/6

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Subhomoy Bakshi ·2010-05-11 15:04:25

used to think that the length of day depends upon rotation of earth abt its tilted axis...teach me basics then....wat afffects the length of day!!![2]

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