269971 A bomber flying upward at an angle of ${53}^{\circ }$ with the vertical releases a bomb at an altitude of $800\mathrm{m}$. The bomb strikes the ground $20\mathrm{s}$ after its release. If $\mathrm{g}=10{\mathrm{ms}}^{-2}$, the velocity at the time of release of the bomb in ${\mathrm{ms}}^{-1}$ is

269972 Two particles move in a uniform gravitational field with an acceleration g. At the initial moment the particles were located at same point and moved with velocities $u_1=9\mathrm{m}{\mathrm{s}}^{-1}$ and ${\mathrm{u}}_2=4\mathrm{m}{\mathrm{s}}^{-1}$ horizontally in opposite directions. The time between the particles at the moment when their velocity vectors are mutually perpendicular in $s$ is (take $\mathrm{g}=10\mathrm{m}{\mathrm{s}}^{-2}$ )

269973 An aeroplane is flying horizontally at a height of $980\mathrm{m}$ with velocity $100{\mathrm{ms}}^{-1}$ drops a food packet. A person on the ground is $414\mathrm{m}$ ahead horizontally from the dropping point. At what velocity should he move so that he can catch the food packet.

270006 From the top of a tower of height$78.4\mathrm{m}$ two stones are projected horizontally with $10\mathrm{m}/\mathrm{s}$ and $20\mathrm{m}/\mathrm{s}$ in opposite directions. On reaching the ground, their separation is

269971 A bomber flying upward at an angle of ${53}^{\circ }$ with the vertical releases a bomb at an altitude of $800\mathrm{m}$. The bomb strikes the ground $20\mathrm{s}$ after its release. If $\mathrm{g}=10{\mathrm{ms}}^{-2}$, the velocity at the time of release of the bomb in ${\mathrm{ms}}^{-1}$ is

269972 Two particles move in a uniform gravitational field with an acceleration g. At the initial moment the particles were located at same point and moved with velocities $u_1=9\mathrm{m}{\mathrm{s}}^{-1}$ and ${\mathrm{u}}_2=4\mathrm{m}{\mathrm{s}}^{-1}$ horizontally in opposite directions. The time between the particles at the moment when their velocity vectors are mutually perpendicular in $s$ is (take $\mathrm{g}=10\mathrm{m}{\mathrm{s}}^{-2}$ )

269973 An aeroplane is flying horizontally at a height of $980\mathrm{m}$ with velocity $100{\mathrm{ms}}^{-1}$ drops a food packet. A person on the ground is $414\mathrm{m}$ ahead horizontally from the dropping point. At what velocity should he move so that he can catch the food packet.

270008 From the top of a building$80\mathrm{m}$ high, a ball is thrown horizontally which hits the ground at a distance. The line joining the top of the building to the point where it hits the ground makes an angle of ${45}^{\circ }$ with the ground. Initial velocity of projection of the ball is $(g=10\mathrm{m}/{\mathrm{s}}^2)$

270006 From the top of a tower of height$78.4\mathrm{m}$ two stones are projected horizontally with $10\mathrm{m}/\mathrm{s}$ and $20\mathrm{m}/\mathrm{s}$ in opposite directions. On reaching the ground, their separation is

269971 A bomber flying upward at an angle of ${53}^{\circ }$ with the vertical releases a bomb at an altitude of $800\mathrm{m}$. The bomb strikes the ground $20\mathrm{s}$ after its release. If $\mathrm{g}=10{\mathrm{ms}}^{-2}$, the velocity at the time of release of the bomb in ${\mathrm{ms}}^{-1}$ is

269972 Two particles move in a uniform gravitational field with an acceleration g. At the initial moment the particles were located at same point and moved with velocities $u_1=9\mathrm{m}{\mathrm{s}}^{-1}$ and ${\mathrm{u}}_2=4\mathrm{m}{\mathrm{s}}^{-1}$ horizontally in opposite directions. The time between the particles at the moment when their velocity vectors are mutually perpendicular in $s$ is (take $\mathrm{g}=10\mathrm{m}{\mathrm{s}}^{-2}$ )

269973 An aeroplane is flying horizontally at a height of $980\mathrm{m}$ with velocity $100{\mathrm{ms}}^{-1}$ drops a food packet. A person on the ground is $414\mathrm{m}$ ahead horizontally from the dropping point. At what velocity should he move so that he can catch the food packet.

270008 From the top of a building$80\mathrm{m}$ high, a ball is thrown horizontally which hits the ground at a distance. The line joining the top of the building to the point where it hits the ground makes an angle of ${45}^{\circ }$ with the ground. Initial velocity of projection of the ball is $(g=10\mathrm{m}/{\mathrm{s}}^2)$

270006 From the top of a tower of height$78.4\mathrm{m}$ two stones are projected horizontally with $10\mathrm{m}/\mathrm{s}$ and $20\mathrm{m}/\mathrm{s}$ in opposite directions. On reaching the ground, their separation is

269971 A bomber flying upward at an angle of ${53}^{\circ }$ with the vertical releases a bomb at an altitude of $800\mathrm{m}$. The bomb strikes the ground $20\mathrm{s}$ after its release. If $\mathrm{g}=10{\mathrm{ms}}^{-2}$, the velocity at the time of release of the bomb in ${\mathrm{ms}}^{-1}$ is

269972 Two particles move in a uniform gravitational field with an acceleration g. At the initial moment the particles were located at same point and moved with velocities $u_1=9\mathrm{m}{\mathrm{s}}^{-1}$ and ${\mathrm{u}}_2=4\mathrm{m}{\mathrm{s}}^{-1}$ horizontally in opposite directions. The time between the particles at the moment when their velocity vectors are mutually perpendicular in $s$ is (take $\mathrm{g}=10\mathrm{m}{\mathrm{s}}^{-2}$ )

269973 An aeroplane is flying horizontally at a height of $980\mathrm{m}$ with velocity $100{\mathrm{ms}}^{-1}$ drops a food packet. A person on the ground is $414\mathrm{m}$ ahead horizontally from the dropping point. At what velocity should he move so that he can catch the food packet.

270008 From the top of a building$80\mathrm{m}$ high, a ball is thrown horizontally which hits the ground at a distance. The line joining the top of the building to the point where it hits the ground makes an angle of ${45}^{\circ }$ with the ground. Initial velocity of projection of the ball is $(g=10\mathrm{m}/{\mathrm{s}}^2)$

270006 From the top of a tower of height$78.4\mathrm{m}$ two stones are projected horizontally with $10\mathrm{m}/\mathrm{s}$ and $20\mathrm{m}/\mathrm{s}$ in opposite directions. On reaching the ground, their separation is

269971 A bomber flying upward at an angle of ${53}^{\circ }$ with the vertical releases a bomb at an altitude of $800\mathrm{m}$. The bomb strikes the ground $20\mathrm{s}$ after its release. If $\mathrm{g}=10{\mathrm{ms}}^{-2}$, the velocity at the time of release of the bomb in ${\mathrm{ms}}^{-1}$ is

269972 Two particles move in a uniform gravitational field with an acceleration g. At the initial moment the particles were located at same point and moved with velocities $u_1=9\mathrm{m}{\mathrm{s}}^{-1}$ and ${\mathrm{u}}_2=4\mathrm{m}{\mathrm{s}}^{-1}$ horizontally in opposite directions. The time between the particles at the moment when their velocity vectors are mutually perpendicular in $s$ is (take $\mathrm{g}=10\mathrm{m}{\mathrm{s}}^{-2}$ )

269973 An aeroplane is flying horizontally at a height of $980\mathrm{m}$ with velocity $100{\mathrm{ms}}^{-1}$ drops a food packet. A person on the ground is $414\mathrm{m}$ ahead horizontally from the dropping point. At what velocity should he move so that he can catch the food packet.

270008 From the top of a building$80\mathrm{m}$ high, a ball is thrown horizontally which hits the ground at a distance. The line joining the top of the building to the point where it hits the ground makes an angle of ${45}^{\circ }$ with the ground. Initial velocity of projection of the ball is $(g=10\mathrm{m}/{\mathrm{s}}^2)$

270006 From the top of a tower of height$78.4\mathrm{m}$ two stones are projected horizontally with $10\mathrm{m}/\mathrm{s}$ and $20\mathrm{m}/\mathrm{s}$ in opposite directions. On reaching the ground, their separation is