04. Motion Under Gravity
Motion in One Dimensions

141886 From the top of a building \(40 \mathrm{~m}\) tall, a boy projects a stone vertically upwards with an initial velocity \(10 \mathrm{~ms}^{-1}\) such that it eventually falls to the ground. After how long will the stone strike the ground? Take \(g=10 \mathrm{~ms}^{-2}\)

1 \(1 \mathrm{~s}\)
2 \(2 \mathrm{~s}\)
3 \(3 \mathrm{~s}\)
4 \(4 \mathrm{~s}\)
Motion in One Dimensions

141887 A mountaineer standing on the edge of a cliff \(441 \mathrm{~m}\) above the ground throws a stone horizontally with an initial speed of \(20 \mathrm{~m} \mathrm{~s}^{-1}\). What is the speed with which the stone reaches the ground?

1 \(90 \mathrm{~m} \mathrm{~s}^{-1}\)
2 \(95.08 \mathrm{~m} \mathrm{~s}^{-1}\)
3 \(85 \mathrm{~m} \mathrm{~s}^{-1}\)
4 \(92 \mathrm{~m} \mathrm{~s}^{-1}\)
Motion in One Dimensions

141888 A constant retarding force of \(80 \mathrm{~N}\) is applied to a body of mass \(50 \mathrm{~kg}\) which is moving initially with a speed of \(20 \mathrm{~m} / \mathrm{s}\). What would be the time required by the body to come to rest?

1 \(15 \mathrm{~s}\)
2 \(14 \mathrm{~s}\)
3 \(12.5 \mathrm{~s}\)
4 \(18 \mathrm{~s}\)
Motion in One Dimensions

141889 A body is thrown vertically upward from a point \(A 125 \mathrm{~m}\) above the ground. It goes up to a maximum height of \(250 \mathrm{~m}\) above the ground and passes through \(A\) on its downward journey. The velocity of the body when it is at a height of \(70 \mathrm{~m}\) above the ground is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

1 \(50 \mathrm{~ms}^{-1}\)
2 \(60 \mathrm{~ms}^{-1}\)
3 \(80 \mathrm{~ms}^{-1}\)
4 \(20 \mathrm{~ms}^{-1}\)
Motion in One Dimensions

141890 A stone is dropped freely, while another is thrown vertically downward with an initial velocity at \(2 \mathrm{~m} / \mathrm{s}\) from the same point, simultaneously. The time required by them to have a distance of separation \(22 \mathrm{~m}\) between them is:

1 \(11 \mathrm{~s}\)
2 \(5.5 \mathrm{~s}\)
3 \(44 \mathrm{~s}\)
4 \(22 \mathrm{~s}\)
Motion in One Dimensions

141886 From the top of a building \(40 \mathrm{~m}\) tall, a boy projects a stone vertically upwards with an initial velocity \(10 \mathrm{~ms}^{-1}\) such that it eventually falls to the ground. After how long will the stone strike the ground? Take \(g=10 \mathrm{~ms}^{-2}\)

1 \(1 \mathrm{~s}\)
2 \(2 \mathrm{~s}\)
3 \(3 \mathrm{~s}\)
4 \(4 \mathrm{~s}\)
Motion in One Dimensions

141887 A mountaineer standing on the edge of a cliff \(441 \mathrm{~m}\) above the ground throws a stone horizontally with an initial speed of \(20 \mathrm{~m} \mathrm{~s}^{-1}\). What is the speed with which the stone reaches the ground?

1 \(90 \mathrm{~m} \mathrm{~s}^{-1}\)
2 \(95.08 \mathrm{~m} \mathrm{~s}^{-1}\)
3 \(85 \mathrm{~m} \mathrm{~s}^{-1}\)
4 \(92 \mathrm{~m} \mathrm{~s}^{-1}\)
Motion in One Dimensions

141888 A constant retarding force of \(80 \mathrm{~N}\) is applied to a body of mass \(50 \mathrm{~kg}\) which is moving initially with a speed of \(20 \mathrm{~m} / \mathrm{s}\). What would be the time required by the body to come to rest?

1 \(15 \mathrm{~s}\)
2 \(14 \mathrm{~s}\)
3 \(12.5 \mathrm{~s}\)
4 \(18 \mathrm{~s}\)
Motion in One Dimensions

141889 A body is thrown vertically upward from a point \(A 125 \mathrm{~m}\) above the ground. It goes up to a maximum height of \(250 \mathrm{~m}\) above the ground and passes through \(A\) on its downward journey. The velocity of the body when it is at a height of \(70 \mathrm{~m}\) above the ground is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

1 \(50 \mathrm{~ms}^{-1}\)
2 \(60 \mathrm{~ms}^{-1}\)
3 \(80 \mathrm{~ms}^{-1}\)
4 \(20 \mathrm{~ms}^{-1}\)
Motion in One Dimensions

141890 A stone is dropped freely, while another is thrown vertically downward with an initial velocity at \(2 \mathrm{~m} / \mathrm{s}\) from the same point, simultaneously. The time required by them to have a distance of separation \(22 \mathrm{~m}\) between them is:

1 \(11 \mathrm{~s}\)
2 \(5.5 \mathrm{~s}\)
3 \(44 \mathrm{~s}\)
4 \(22 \mathrm{~s}\)
Motion in One Dimensions

141886 From the top of a building \(40 \mathrm{~m}\) tall, a boy projects a stone vertically upwards with an initial velocity \(10 \mathrm{~ms}^{-1}\) such that it eventually falls to the ground. After how long will the stone strike the ground? Take \(g=10 \mathrm{~ms}^{-2}\)

1 \(1 \mathrm{~s}\)
2 \(2 \mathrm{~s}\)
3 \(3 \mathrm{~s}\)
4 \(4 \mathrm{~s}\)
Motion in One Dimensions

141887 A mountaineer standing on the edge of a cliff \(441 \mathrm{~m}\) above the ground throws a stone horizontally with an initial speed of \(20 \mathrm{~m} \mathrm{~s}^{-1}\). What is the speed with which the stone reaches the ground?

1 \(90 \mathrm{~m} \mathrm{~s}^{-1}\)
2 \(95.08 \mathrm{~m} \mathrm{~s}^{-1}\)
3 \(85 \mathrm{~m} \mathrm{~s}^{-1}\)
4 \(92 \mathrm{~m} \mathrm{~s}^{-1}\)
Motion in One Dimensions

141888 A constant retarding force of \(80 \mathrm{~N}\) is applied to a body of mass \(50 \mathrm{~kg}\) which is moving initially with a speed of \(20 \mathrm{~m} / \mathrm{s}\). What would be the time required by the body to come to rest?

1 \(15 \mathrm{~s}\)
2 \(14 \mathrm{~s}\)
3 \(12.5 \mathrm{~s}\)
4 \(18 \mathrm{~s}\)
Motion in One Dimensions

141889 A body is thrown vertically upward from a point \(A 125 \mathrm{~m}\) above the ground. It goes up to a maximum height of \(250 \mathrm{~m}\) above the ground and passes through \(A\) on its downward journey. The velocity of the body when it is at a height of \(70 \mathrm{~m}\) above the ground is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

1 \(50 \mathrm{~ms}^{-1}\)
2 \(60 \mathrm{~ms}^{-1}\)
3 \(80 \mathrm{~ms}^{-1}\)
4 \(20 \mathrm{~ms}^{-1}\)
Motion in One Dimensions

141890 A stone is dropped freely, while another is thrown vertically downward with an initial velocity at \(2 \mathrm{~m} / \mathrm{s}\) from the same point, simultaneously. The time required by them to have a distance of separation \(22 \mathrm{~m}\) between them is:

1 \(11 \mathrm{~s}\)
2 \(5.5 \mathrm{~s}\)
3 \(44 \mathrm{~s}\)
4 \(22 \mathrm{~s}\)
Motion in One Dimensions

141886 From the top of a building \(40 \mathrm{~m}\) tall, a boy projects a stone vertically upwards with an initial velocity \(10 \mathrm{~ms}^{-1}\) such that it eventually falls to the ground. After how long will the stone strike the ground? Take \(g=10 \mathrm{~ms}^{-2}\)

1 \(1 \mathrm{~s}\)
2 \(2 \mathrm{~s}\)
3 \(3 \mathrm{~s}\)
4 \(4 \mathrm{~s}\)
Motion in One Dimensions

141887 A mountaineer standing on the edge of a cliff \(441 \mathrm{~m}\) above the ground throws a stone horizontally with an initial speed of \(20 \mathrm{~m} \mathrm{~s}^{-1}\). What is the speed with which the stone reaches the ground?

1 \(90 \mathrm{~m} \mathrm{~s}^{-1}\)
2 \(95.08 \mathrm{~m} \mathrm{~s}^{-1}\)
3 \(85 \mathrm{~m} \mathrm{~s}^{-1}\)
4 \(92 \mathrm{~m} \mathrm{~s}^{-1}\)
Motion in One Dimensions

141888 A constant retarding force of \(80 \mathrm{~N}\) is applied to a body of mass \(50 \mathrm{~kg}\) which is moving initially with a speed of \(20 \mathrm{~m} / \mathrm{s}\). What would be the time required by the body to come to rest?

1 \(15 \mathrm{~s}\)
2 \(14 \mathrm{~s}\)
3 \(12.5 \mathrm{~s}\)
4 \(18 \mathrm{~s}\)
Motion in One Dimensions

141889 A body is thrown vertically upward from a point \(A 125 \mathrm{~m}\) above the ground. It goes up to a maximum height of \(250 \mathrm{~m}\) above the ground and passes through \(A\) on its downward journey. The velocity of the body when it is at a height of \(70 \mathrm{~m}\) above the ground is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

1 \(50 \mathrm{~ms}^{-1}\)
2 \(60 \mathrm{~ms}^{-1}\)
3 \(80 \mathrm{~ms}^{-1}\)
4 \(20 \mathrm{~ms}^{-1}\)
Motion in One Dimensions

141890 A stone is dropped freely, while another is thrown vertically downward with an initial velocity at \(2 \mathrm{~m} / \mathrm{s}\) from the same point, simultaneously. The time required by them to have a distance of separation \(22 \mathrm{~m}\) between them is:

1 \(11 \mathrm{~s}\)
2 \(5.5 \mathrm{~s}\)
3 \(44 \mathrm{~s}\)
4 \(22 \mathrm{~s}\)
Motion in One Dimensions

141886 From the top of a building \(40 \mathrm{~m}\) tall, a boy projects a stone vertically upwards with an initial velocity \(10 \mathrm{~ms}^{-1}\) such that it eventually falls to the ground. After how long will the stone strike the ground? Take \(g=10 \mathrm{~ms}^{-2}\)

1 \(1 \mathrm{~s}\)
2 \(2 \mathrm{~s}\)
3 \(3 \mathrm{~s}\)
4 \(4 \mathrm{~s}\)
Motion in One Dimensions

141887 A mountaineer standing on the edge of a cliff \(441 \mathrm{~m}\) above the ground throws a stone horizontally with an initial speed of \(20 \mathrm{~m} \mathrm{~s}^{-1}\). What is the speed with which the stone reaches the ground?

1 \(90 \mathrm{~m} \mathrm{~s}^{-1}\)
2 \(95.08 \mathrm{~m} \mathrm{~s}^{-1}\)
3 \(85 \mathrm{~m} \mathrm{~s}^{-1}\)
4 \(92 \mathrm{~m} \mathrm{~s}^{-1}\)
Motion in One Dimensions

141888 A constant retarding force of \(80 \mathrm{~N}\) is applied to a body of mass \(50 \mathrm{~kg}\) which is moving initially with a speed of \(20 \mathrm{~m} / \mathrm{s}\). What would be the time required by the body to come to rest?

1 \(15 \mathrm{~s}\)
2 \(14 \mathrm{~s}\)
3 \(12.5 \mathrm{~s}\)
4 \(18 \mathrm{~s}\)
Motion in One Dimensions

141889 A body is thrown vertically upward from a point \(A 125 \mathrm{~m}\) above the ground. It goes up to a maximum height of \(250 \mathrm{~m}\) above the ground and passes through \(A\) on its downward journey. The velocity of the body when it is at a height of \(70 \mathrm{~m}\) above the ground is \(\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)

1 \(50 \mathrm{~ms}^{-1}\)
2 \(60 \mathrm{~ms}^{-1}\)
3 \(80 \mathrm{~ms}^{-1}\)
4 \(20 \mathrm{~ms}^{-1}\)
Motion in One Dimensions

141890 A stone is dropped freely, while another is thrown vertically downward with an initial velocity at \(2 \mathrm{~m} / \mathrm{s}\) from the same point, simultaneously. The time required by them to have a distance of separation \(22 \mathrm{~m}\) between them is:

1 \(11 \mathrm{~s}\)
2 \(5.5 \mathrm{~s}\)
3 \(44 \mathrm{~s}\)
4 \(22 \mathrm{~s}\)