141790 A balloon going upward with a velocity of \(12 \mathrm{~m} / \mathrm{s}\) is at a height of \(65 \mathrm{~m}\) from the earth's surface at any instant. Exactly at this instant a ball drops from it. How much time will the ball take in reaching the surface of earth?
\(\left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)

141791 A ball is dropped vertically from a height \(d\) above the ground. It hits the ground and bounces up vertically to a height \(\frac{d}{2}\). Neglecting subsequent motion and air resistance, its velocity \(v\) varies with the height \(h\) above the ground as

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141792 A ball is dropped from a high rise platform at \(t\) = 0 starting from rest. After 6 seconds another ball is thrown downwards from the same platform with a speed \(v\). The two balls meet at \(t\) \(=18 \mathrm{~s}\). What is the value of \(v\) ? (take \(g=10 \mathrm{~m} / \mathrm{s}^{2}\) )

141793 A balloon of mass \(M\) descends with an acceleration a (where \(\mathbf{a} \lt \mathbf{g}\) ). What mass need to be removed from the balloon, so that it starts ascending with acceleration, \(a\) ?

141790 A balloon going upward with a velocity of \(12 \mathrm{~m} / \mathrm{s}\) is at a height of \(65 \mathrm{~m}\) from the earth's surface at any instant. Exactly at this instant a ball drops from it. How much time will the ball take in reaching the surface of earth?
\(\left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)

141791 A ball is dropped vertically from a height \(d\) above the ground. It hits the ground and bounces up vertically to a height \(\frac{d}{2}\). Neglecting subsequent motion and air resistance, its velocity \(v\) varies with the height \(h\) above the ground as

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141792 A ball is dropped from a high rise platform at \(t\) = 0 starting from rest. After 6 seconds another ball is thrown downwards from the same platform with a speed \(v\). The two balls meet at \(t\) \(=18 \mathrm{~s}\). What is the value of \(v\) ? (take \(g=10 \mathrm{~m} / \mathrm{s}^{2}\) )

141793 A balloon of mass \(M\) descends with an acceleration a (where \(\mathbf{a} \lt \mathbf{g}\) ). What mass need to be removed from the balloon, so that it starts ascending with acceleration, \(a\) ?

141790 A balloon going upward with a velocity of \(12 \mathrm{~m} / \mathrm{s}\) is at a height of \(65 \mathrm{~m}\) from the earth's surface at any instant. Exactly at this instant a ball drops from it. How much time will the ball take in reaching the surface of earth?
\(\left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)

141791 A ball is dropped vertically from a height \(d\) above the ground. It hits the ground and bounces up vertically to a height \(\frac{d}{2}\). Neglecting subsequent motion and air resistance, its velocity \(v\) varies with the height \(h\) above the ground as

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141792 A ball is dropped from a high rise platform at \(t\) = 0 starting from rest. After 6 seconds another ball is thrown downwards from the same platform with a speed \(v\). The two balls meet at \(t\) \(=18 \mathrm{~s}\). What is the value of \(v\) ? (take \(g=10 \mathrm{~m} / \mathrm{s}^{2}\) )

141793 A balloon of mass \(M\) descends with an acceleration a (where \(\mathbf{a} \lt \mathbf{g}\) ). What mass need to be removed from the balloon, so that it starts ascending with acceleration, \(a\) ?

141790 A balloon going upward with a velocity of \(12 \mathrm{~m} / \mathrm{s}\) is at a height of \(65 \mathrm{~m}\) from the earth's surface at any instant. Exactly at this instant a ball drops from it. How much time will the ball take in reaching the surface of earth?
\(\left(\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2}\right)\)

141791 A ball is dropped vertically from a height \(d\) above the ground. It hits the ground and bounces up vertically to a height \(\frac{d}{2}\). Neglecting subsequent motion and air resistance, its velocity \(v\) varies with the height \(h\) above the ground as

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141792 A ball is dropped from a high rise platform at \(t\) = 0 starting from rest. After 6 seconds another ball is thrown downwards from the same platform with a speed \(v\). The two balls meet at \(t\) \(=18 \mathrm{~s}\). What is the value of \(v\) ? (take \(g=10 \mathrm{~m} / \mathrm{s}^{2}\) )

141793 A balloon of mass \(M\) descends with an acceleration a (where \(\mathbf{a} \lt \mathbf{g}\) ). What mass need to be removed from the balloon, so that it starts ascending with acceleration, \(a\) ?