269931 A bomb is dropped from anaeroplane flying horizontally with a velocity of \(720 \mathrm{kmph}\) at an altitude of \(980 \mathrm{~m}\). Time taken by the bomb to hit the ground is

269932 A body is projected horizontally from a height of\(78.4 \mathrm{~m}\) with a velocity \(10 \mathrm{~ms}^{-1}\). Its velocity after 3 seconds is \(\left(g=10 \mathrm{~ms}^{-2}\right)\) (Take direction of projection as \(i\) and vertically upward direction as \(\mathbf{j})\)

269933 Two thin wood screens \(A\) and \(B\) are separated by \(200 \mathrm{~m}\) a bullet travelling horizontally at speed of \(600 \mathrm{~m} / \mathrm{s}\) hits the screen A penetrates through it and finally emerges out from \(B\) making holes in \(A\) and \(B\) the resistance of air and wood are negligible the difference of heights of the holes in \(A\) and \(B\) is.

269966 A stair case contains ten steps each \(10 \mathrm{~cm}\) high and \(20 \mathrm{~cm}\) wide. The minimum horizontal velocity with which the ball has to be rolled off the upper most step, so as to hit directly the edge of the lowest step is (approximately)

269931 A bomb is dropped from anaeroplane flying horizontally with a velocity of \(720 \mathrm{kmph}\) at an altitude of \(980 \mathrm{~m}\). Time taken by the bomb to hit the ground is

269932 A body is projected horizontally from a height of\(78.4 \mathrm{~m}\) with a velocity \(10 \mathrm{~ms}^{-1}\). Its velocity after 3 seconds is \(\left(g=10 \mathrm{~ms}^{-2}\right)\) (Take direction of projection as \(i\) and vertically upward direction as \(\mathbf{j})\)

269933 Two thin wood screens \(A\) and \(B\) are separated by \(200 \mathrm{~m}\) a bullet travelling horizontally at speed of \(600 \mathrm{~m} / \mathrm{s}\) hits the screen A penetrates through it and finally emerges out from \(B\) making holes in \(A\) and \(B\) the resistance of air and wood are negligible the difference of heights of the holes in \(A\) and \(B\) is.

269966 A stair case contains ten steps each \(10 \mathrm{~cm}\) high and \(20 \mathrm{~cm}\) wide. The minimum horizontal velocity with which the ball has to be rolled off the upper most step, so as to hit directly the edge of the lowest step is (approximately)

269931 A bomb is dropped from anaeroplane flying horizontally with a velocity of \(720 \mathrm{kmph}\) at an altitude of \(980 \mathrm{~m}\). Time taken by the bomb to hit the ground is

269932 A body is projected horizontally from a height of\(78.4 \mathrm{~m}\) with a velocity \(10 \mathrm{~ms}^{-1}\). Its velocity after 3 seconds is \(\left(g=10 \mathrm{~ms}^{-2}\right)\) (Take direction of projection as \(i\) and vertically upward direction as \(\mathbf{j})\)

269933 Two thin wood screens \(A\) and \(B\) are separated by \(200 \mathrm{~m}\) a bullet travelling horizontally at speed of \(600 \mathrm{~m} / \mathrm{s}\) hits the screen A penetrates through it and finally emerges out from \(B\) making holes in \(A\) and \(B\) the resistance of air and wood are negligible the difference of heights of the holes in \(A\) and \(B\) is.

269966 A stair case contains ten steps each \(10 \mathrm{~cm}\) high and \(20 \mathrm{~cm}\) wide. The minimum horizontal velocity with which the ball has to be rolled off the upper most step, so as to hit directly the edge of the lowest step is (approximately)

269931 A bomb is dropped from anaeroplane flying horizontally with a velocity of \(720 \mathrm{kmph}\) at an altitude of \(980 \mathrm{~m}\). Time taken by the bomb to hit the ground is

269932 A body is projected horizontally from a height of\(78.4 \mathrm{~m}\) with a velocity \(10 \mathrm{~ms}^{-1}\). Its velocity after 3 seconds is \(\left(g=10 \mathrm{~ms}^{-2}\right)\) (Take direction of projection as \(i\) and vertically upward direction as \(\mathbf{j})\)

269933 Two thin wood screens \(A\) and \(B\) are separated by \(200 \mathrm{~m}\) a bullet travelling horizontally at speed of \(600 \mathrm{~m} / \mathrm{s}\) hits the screen A penetrates through it and finally emerges out from \(B\) making holes in \(A\) and \(B\) the resistance of air and wood are negligible the difference of heights of the holes in \(A\) and \(B\) is.

269966 A stair case contains ten steps each \(10 \mathrm{~cm}\) high and \(20 \mathrm{~cm}\) wide. The minimum horizontal velocity with which the ball has to be rolled off the upper most step, so as to hit directly the edge of the lowest step is (approximately)