POTENTIAL ENERGY
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Work, Energy and Power

268653 A tank of size \(10 \mathrm{~m} \times 10 \mathrm{~m} \times 10 \mathrm{~m}\) is full of water and built on the ground. If \(g=10 \mathrm{~ms}^{-2}\), the potential energy of the water in the tank is

1 \(5 \times 10^{7} \mathrm{~J}\)
2 \(1 \times 10^{8} \mathrm{~J}\)
3 \(5 \times 10^{4} \mathrm{~J}\)
4 \(5 \times 10^{5} \mathrm{~J}\)
Work, Energy and Power

268654 A bolt of mass \(0.3 \mathrm{~kg}\) falls from the ceiling of an elevator moving down with an uniform speed of \(7 \mathrm{~m} / \mathrm{s}\). It hits the floor of the elevator (length of the elevator \(=3 \mathrm{~m}\) ) and does not rebound. What is the heat produced by impact?

1 8.82J
2 \(7.72 \mathrm{~J}\)
3 \(6.62 \mathrm{~J}\)
4 \(5.52 \mathrm{~J}\)
Work, Energy and Power

268655 A spring when compressed by \(4 \mathrm{~cm}\) has \(2 \mathrm{~J}\) energy stored in it. The force required to extend it by \(8 \mathrm{~cm}\) will be

1 \(20 \mathrm{~N}\)
2 \(2 \mathrm{~N}\)
3 \(200 \mathrm{~N}\)
4 \(2000 \mathrm{~N}\)
Work, Energy and Power

268656 The elastic potential energy of a stretched spring is given by \(\mathrm{E}=50 x^{2}\). Where \(x\) is the displacement in meter and \(E\) is in joule, then the force constant of the spring is

1 \(50 \mathrm{Nm}\)
2 \(100 \mathrm{~N} \mathrm{~m}^{-1}\)
3 \(100 \mathrm{~N} / \mathrm{m}^{2}\)
4 \(100 \mathrm{Nm}\)
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Work, Energy and Power

268653 A tank of size \(10 \mathrm{~m} \times 10 \mathrm{~m} \times 10 \mathrm{~m}\) is full of water and built on the ground. If \(g=10 \mathrm{~ms}^{-2}\), the potential energy of the water in the tank is

1 \(5 \times 10^{7} \mathrm{~J}\)
2 \(1 \times 10^{8} \mathrm{~J}\)
3 \(5 \times 10^{4} \mathrm{~J}\)
4 \(5 \times 10^{5} \mathrm{~J}\)
Work, Energy and Power

268654 A bolt of mass \(0.3 \mathrm{~kg}\) falls from the ceiling of an elevator moving down with an uniform speed of \(7 \mathrm{~m} / \mathrm{s}\). It hits the floor of the elevator (length of the elevator \(=3 \mathrm{~m}\) ) and does not rebound. What is the heat produced by impact?

1 8.82J
2 \(7.72 \mathrm{~J}\)
3 \(6.62 \mathrm{~J}\)
4 \(5.52 \mathrm{~J}\)
Work, Energy and Power

268655 A spring when compressed by \(4 \mathrm{~cm}\) has \(2 \mathrm{~J}\) energy stored in it. The force required to extend it by \(8 \mathrm{~cm}\) will be

1 \(20 \mathrm{~N}\)
2 \(2 \mathrm{~N}\)
3 \(200 \mathrm{~N}\)
4 \(2000 \mathrm{~N}\)
Work, Energy and Power

268656 The elastic potential energy of a stretched spring is given by \(\mathrm{E}=50 x^{2}\). Where \(x\) is the displacement in meter and \(E\) is in joule, then the force constant of the spring is

1 \(50 \mathrm{Nm}\)
2 \(100 \mathrm{~N} \mathrm{~m}^{-1}\)
3 \(100 \mathrm{~N} / \mathrm{m}^{2}\)
4 \(100 \mathrm{Nm}\)
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Work, Energy and Power

268653 A tank of size \(10 \mathrm{~m} \times 10 \mathrm{~m} \times 10 \mathrm{~m}\) is full of water and built on the ground. If \(g=10 \mathrm{~ms}^{-2}\), the potential energy of the water in the tank is

1 \(5 \times 10^{7} \mathrm{~J}\)
2 \(1 \times 10^{8} \mathrm{~J}\)
3 \(5 \times 10^{4} \mathrm{~J}\)
4 \(5 \times 10^{5} \mathrm{~J}\)
Work, Energy and Power

268654 A bolt of mass \(0.3 \mathrm{~kg}\) falls from the ceiling of an elevator moving down with an uniform speed of \(7 \mathrm{~m} / \mathrm{s}\). It hits the floor of the elevator (length of the elevator \(=3 \mathrm{~m}\) ) and does not rebound. What is the heat produced by impact?

1 8.82J
2 \(7.72 \mathrm{~J}\)
3 \(6.62 \mathrm{~J}\)
4 \(5.52 \mathrm{~J}\)
Work, Energy and Power

268655 A spring when compressed by \(4 \mathrm{~cm}\) has \(2 \mathrm{~J}\) energy stored in it. The force required to extend it by \(8 \mathrm{~cm}\) will be

1 \(20 \mathrm{~N}\)
2 \(2 \mathrm{~N}\)
3 \(200 \mathrm{~N}\)
4 \(2000 \mathrm{~N}\)
Work, Energy and Power

268656 The elastic potential energy of a stretched spring is given by \(\mathrm{E}=50 x^{2}\). Where \(x\) is the displacement in meter and \(E\) is in joule, then the force constant of the spring is

1 \(50 \mathrm{Nm}\)
2 \(100 \mathrm{~N} \mathrm{~m}^{-1}\)
3 \(100 \mathrm{~N} / \mathrm{m}^{2}\)
4 \(100 \mathrm{Nm}\)
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Work, Energy and Power

268653 A tank of size \(10 \mathrm{~m} \times 10 \mathrm{~m} \times 10 \mathrm{~m}\) is full of water and built on the ground. If \(g=10 \mathrm{~ms}^{-2}\), the potential energy of the water in the tank is

1 \(5 \times 10^{7} \mathrm{~J}\)
2 \(1 \times 10^{8} \mathrm{~J}\)
3 \(5 \times 10^{4} \mathrm{~J}\)
4 \(5 \times 10^{5} \mathrm{~J}\)
Work, Energy and Power

268654 A bolt of mass \(0.3 \mathrm{~kg}\) falls from the ceiling of an elevator moving down with an uniform speed of \(7 \mathrm{~m} / \mathrm{s}\). It hits the floor of the elevator (length of the elevator \(=3 \mathrm{~m}\) ) and does not rebound. What is the heat produced by impact?

1 8.82J
2 \(7.72 \mathrm{~J}\)
3 \(6.62 \mathrm{~J}\)
4 \(5.52 \mathrm{~J}\)
Work, Energy and Power

268655 A spring when compressed by \(4 \mathrm{~cm}\) has \(2 \mathrm{~J}\) energy stored in it. The force required to extend it by \(8 \mathrm{~cm}\) will be

1 \(20 \mathrm{~N}\)
2 \(2 \mathrm{~N}\)
3 \(200 \mathrm{~N}\)
4 \(2000 \mathrm{~N}\)
Work, Energy and Power

268656 The elastic potential energy of a stretched spring is given by \(\mathrm{E}=50 x^{2}\). Where \(x\) is the displacement in meter and \(E\) is in joule, then the force constant of the spring is

1 \(50 \mathrm{Nm}\)
2 \(100 \mathrm{~N} \mathrm{~m}^{-1}\)
3 \(100 \mathrm{~N} / \mathrm{m}^{2}\)
4 \(100 \mathrm{Nm}\)
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