141798
A ball is thrown upward from the top of a building at an angle of \(30^{\circ}\) to the horizontal and with an initial speed of \(20 \mathrm{~m} \mathrm{~s}^{-1}\). If the ball strikes the ground after \(3 \mathrm{~s}\), then the height of the buildings is-
(acceleration due to gravity \(=10 \mathbf{m s}^{-2}\) )
141799 When a ball is dropped from a height \(h\) it takes \(t\) sec to reach the ground. If the same experiment is done on a different planet having the mass 100 times the earth's mass and radius 10 times the earth's radius, then the time it will take to cover the same height in the new planet is
141800 An object of mass \(5 \mathrm{~kg}\) is thrown vertically upwards from the ground. The air resistance produces a constant retarding force of \(10 \mathrm{~N}\) throughout the motion. The ratio of time of ascent to the time of descent will be equal to : [Use \(\mathrm{g}=10 \mathrm{~ms}^{-2}\) ]
141801 A ball is thrown upward from the top of a building at angle of \(30^{\circ}\) to the horizontal with an initial speed of \(15 \mathrm{~ms}^{-1}\). If the ball hits the ground after \(3 \mathrm{~s}\), then the height of building is(acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )
141802
A hot air balloon is descending with a constant acceleration of \(2 \mathrm{~ms}^{-2}\). The mass of the balloon and its contents is \(600 \mathrm{~kg}\). Assuming the volume of balloon is kept constant the mass of the balloon required so that the balloon starts ascending with the same acceleration.
(Acceleration due to gravity \(=10 \mathrm{~m} \mathrm{~s}^{-\mathbf{2}}\) )
141798
A ball is thrown upward from the top of a building at an angle of \(30^{\circ}\) to the horizontal and with an initial speed of \(20 \mathrm{~m} \mathrm{~s}^{-1}\). If the ball strikes the ground after \(3 \mathrm{~s}\), then the height of the buildings is-
(acceleration due to gravity \(=10 \mathbf{m s}^{-2}\) )
141799 When a ball is dropped from a height \(h\) it takes \(t\) sec to reach the ground. If the same experiment is done on a different planet having the mass 100 times the earth's mass and radius 10 times the earth's radius, then the time it will take to cover the same height in the new planet is
141800 An object of mass \(5 \mathrm{~kg}\) is thrown vertically upwards from the ground. The air resistance produces a constant retarding force of \(10 \mathrm{~N}\) throughout the motion. The ratio of time of ascent to the time of descent will be equal to : [Use \(\mathrm{g}=10 \mathrm{~ms}^{-2}\) ]
141801 A ball is thrown upward from the top of a building at angle of \(30^{\circ}\) to the horizontal with an initial speed of \(15 \mathrm{~ms}^{-1}\). If the ball hits the ground after \(3 \mathrm{~s}\), then the height of building is(acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )
141802
A hot air balloon is descending with a constant acceleration of \(2 \mathrm{~ms}^{-2}\). The mass of the balloon and its contents is \(600 \mathrm{~kg}\). Assuming the volume of balloon is kept constant the mass of the balloon required so that the balloon starts ascending with the same acceleration.
(Acceleration due to gravity \(=10 \mathrm{~m} \mathrm{~s}^{-\mathbf{2}}\) )
141798
A ball is thrown upward from the top of a building at an angle of \(30^{\circ}\) to the horizontal and with an initial speed of \(20 \mathrm{~m} \mathrm{~s}^{-1}\). If the ball strikes the ground after \(3 \mathrm{~s}\), then the height of the buildings is-
(acceleration due to gravity \(=10 \mathbf{m s}^{-2}\) )
141799 When a ball is dropped from a height \(h\) it takes \(t\) sec to reach the ground. If the same experiment is done on a different planet having the mass 100 times the earth's mass and radius 10 times the earth's radius, then the time it will take to cover the same height in the new planet is
141800 An object of mass \(5 \mathrm{~kg}\) is thrown vertically upwards from the ground. The air resistance produces a constant retarding force of \(10 \mathrm{~N}\) throughout the motion. The ratio of time of ascent to the time of descent will be equal to : [Use \(\mathrm{g}=10 \mathrm{~ms}^{-2}\) ]
141801 A ball is thrown upward from the top of a building at angle of \(30^{\circ}\) to the horizontal with an initial speed of \(15 \mathrm{~ms}^{-1}\). If the ball hits the ground after \(3 \mathrm{~s}\), then the height of building is(acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )
141802
A hot air balloon is descending with a constant acceleration of \(2 \mathrm{~ms}^{-2}\). The mass of the balloon and its contents is \(600 \mathrm{~kg}\). Assuming the volume of balloon is kept constant the mass of the balloon required so that the balloon starts ascending with the same acceleration.
(Acceleration due to gravity \(=10 \mathrm{~m} \mathrm{~s}^{-\mathbf{2}}\) )
141798
A ball is thrown upward from the top of a building at an angle of \(30^{\circ}\) to the horizontal and with an initial speed of \(20 \mathrm{~m} \mathrm{~s}^{-1}\). If the ball strikes the ground after \(3 \mathrm{~s}\), then the height of the buildings is-
(acceleration due to gravity \(=10 \mathbf{m s}^{-2}\) )
141799 When a ball is dropped from a height \(h\) it takes \(t\) sec to reach the ground. If the same experiment is done on a different planet having the mass 100 times the earth's mass and radius 10 times the earth's radius, then the time it will take to cover the same height in the new planet is
141800 An object of mass \(5 \mathrm{~kg}\) is thrown vertically upwards from the ground. The air resistance produces a constant retarding force of \(10 \mathrm{~N}\) throughout the motion. The ratio of time of ascent to the time of descent will be equal to : [Use \(\mathrm{g}=10 \mathrm{~ms}^{-2}\) ]
141801 A ball is thrown upward from the top of a building at angle of \(30^{\circ}\) to the horizontal with an initial speed of \(15 \mathrm{~ms}^{-1}\). If the ball hits the ground after \(3 \mathrm{~s}\), then the height of building is(acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )
141802
A hot air balloon is descending with a constant acceleration of \(2 \mathrm{~ms}^{-2}\). The mass of the balloon and its contents is \(600 \mathrm{~kg}\). Assuming the volume of balloon is kept constant the mass of the balloon required so that the balloon starts ascending with the same acceleration.
(Acceleration due to gravity \(=10 \mathrm{~m} \mathrm{~s}^{-\mathbf{2}}\) )
141798
A ball is thrown upward from the top of a building at an angle of \(30^{\circ}\) to the horizontal and with an initial speed of \(20 \mathrm{~m} \mathrm{~s}^{-1}\). If the ball strikes the ground after \(3 \mathrm{~s}\), then the height of the buildings is-
(acceleration due to gravity \(=10 \mathbf{m s}^{-2}\) )
141799 When a ball is dropped from a height \(h\) it takes \(t\) sec to reach the ground. If the same experiment is done on a different planet having the mass 100 times the earth's mass and radius 10 times the earth's radius, then the time it will take to cover the same height in the new planet is
141800 An object of mass \(5 \mathrm{~kg}\) is thrown vertically upwards from the ground. The air resistance produces a constant retarding force of \(10 \mathrm{~N}\) throughout the motion. The ratio of time of ascent to the time of descent will be equal to : [Use \(\mathrm{g}=10 \mathrm{~ms}^{-2}\) ]
141801 A ball is thrown upward from the top of a building at angle of \(30^{\circ}\) to the horizontal with an initial speed of \(15 \mathrm{~ms}^{-1}\). If the ball hits the ground after \(3 \mathrm{~s}\), then the height of building is(acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )
141802
A hot air balloon is descending with a constant acceleration of \(2 \mathrm{~ms}^{-2}\). The mass of the balloon and its contents is \(600 \mathrm{~kg}\). Assuming the volume of balloon is kept constant the mass of the balloon required so that the balloon starts ascending with the same acceleration.
(Acceleration due to gravity \(=10 \mathrm{~m} \mathrm{~s}^{-\mathbf{2}}\) )