Questions
Identical guns fire identical bullets horizontally at the same speed from the same height above level planes, one on the Earth and one on the Moon. Which of the following three statements is/are true?
I. The horizontal distance travelled by the bullet is greater for the Moon.
II. The flight time is less for the bullet on the Earth.
III. The velocities of the bullets at impact are the same.
detailed solution
Correct option is B
The figure can be represented as follows: The expressions areh=12gt2; t=2hg; x=ut=2hgu or t∝1g; x∝1gFor moon, gmoon=g6,substituting in Eq. (1) and comparing, we gettMoon=6t>tEarth, xMoon=6x>xEarthHence, Statements I and II both are correct.Now, vx = u, sovy=gt=g2hg=2ghor v∝g. Since gMoon=g/6, we have vMoonSimilar Questions
A stone is thrown horizontally with velocity g ms-1 from the top of a tower of height g metre. The velocity with which it hits the ground is (in ms-1)
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