System of Varying Mass
LAWS OF MOTION (ADDITIONAL)

372199 A rocket is fired vertically from the ground with a resultant vertical acceleration of a \(10 \mathrm{~ms}^{-2}\). Fuel is finished in 1 min and it continues to move up. What is the maximum height reached?

1 \(36.4 \mathrm{~km}\)
2 \(42.3 \mathrm{~km}\)
3 \(48.4 \mathrm{~km}\)
4 \(25.6 \mathrm{~km}\)
LAWS OF MOTION (ADDITIONAL)

372200 The motion of a rocket in upward direction with high speed is based on the principle of conservation of

1 angular momentum
2 kinetic energy
3 linear momentum
4 mass
LAWS OF MOTION (ADDITIONAL)

372201 In a rocket, fuel burns at a the rate of \(1 \mathrm{~kg} / \mathrm{s}\). This fuel is ejected from the rocket with a velocity of \(60 \mathrm{~km} / \mathrm{s}\). The force exerted on the rocket by this is

1 \(60 \mathrm{~N}\)
2 \(600 \mathrm{~N}\)
3 \(6000 \mathrm{~N}\)
4 \(60000 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

372202 A rocket is launched straight up from the surface of the earth. When its altitude is \(\frac{1}{3}\) of
the radius of the earth, its fuel runs out and therefore it coasts. If the rocket has to escape from the gravitational pull the earth, the minimum velocity with which it should coast is (Escape velocity on the surface of the earth is \(11.2 \mathrm{kms}^{-1}\).)

1 \(11.2 \mathrm{kms}^{-1}\)
2 \(10.7 \mathrm{kms}^{-1}\)
3 \(9.7 \mathrm{kms}^{-1}\)
4 \(8.7 \mathrm{kms}^{-1}\)
LAWS OF MOTION (ADDITIONAL)

372203 A rocket is about to launch upwards from its platform. The engine ejects gas at a rate of \(2100 \mathrm{~kg} / \mathrm{s}\) and the molecules are expelled at 50 \(\mathrm{km} / \mathrm{s}\). If the above condition is just sufficient to make it rise upwards the mass of the rocket is (Assume \(g=10 \mathrm{~m} / \mathrm{s}^{2}\) )

1 \(12.6 \times 10^{5} \mathrm{~kg}\)
2 \(15.5 \times 10^{6} \mathrm{~kg}\)
3 \(9.8 \times 10^{5} \mathrm{~kg}\)
4 \(10.5 \times 10^{6} \mathrm{~kg}\)
LAWS OF MOTION (ADDITIONAL)

372199 A rocket is fired vertically from the ground with a resultant vertical acceleration of a \(10 \mathrm{~ms}^{-2}\). Fuel is finished in 1 min and it continues to move up. What is the maximum height reached?

1 \(36.4 \mathrm{~km}\)
2 \(42.3 \mathrm{~km}\)
3 \(48.4 \mathrm{~km}\)
4 \(25.6 \mathrm{~km}\)
LAWS OF MOTION (ADDITIONAL)

372200 The motion of a rocket in upward direction with high speed is based on the principle of conservation of

1 angular momentum
2 kinetic energy
3 linear momentum
4 mass
LAWS OF MOTION (ADDITIONAL)

372201 In a rocket, fuel burns at a the rate of \(1 \mathrm{~kg} / \mathrm{s}\). This fuel is ejected from the rocket with a velocity of \(60 \mathrm{~km} / \mathrm{s}\). The force exerted on the rocket by this is

1 \(60 \mathrm{~N}\)
2 \(600 \mathrm{~N}\)
3 \(6000 \mathrm{~N}\)
4 \(60000 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

372202 A rocket is launched straight up from the surface of the earth. When its altitude is \(\frac{1}{3}\) of
the radius of the earth, its fuel runs out and therefore it coasts. If the rocket has to escape from the gravitational pull the earth, the minimum velocity with which it should coast is (Escape velocity on the surface of the earth is \(11.2 \mathrm{kms}^{-1}\).)

1 \(11.2 \mathrm{kms}^{-1}\)
2 \(10.7 \mathrm{kms}^{-1}\)
3 \(9.7 \mathrm{kms}^{-1}\)
4 \(8.7 \mathrm{kms}^{-1}\)
LAWS OF MOTION (ADDITIONAL)

372203 A rocket is about to launch upwards from its platform. The engine ejects gas at a rate of \(2100 \mathrm{~kg} / \mathrm{s}\) and the molecules are expelled at 50 \(\mathrm{km} / \mathrm{s}\). If the above condition is just sufficient to make it rise upwards the mass of the rocket is (Assume \(g=10 \mathrm{~m} / \mathrm{s}^{2}\) )

1 \(12.6 \times 10^{5} \mathrm{~kg}\)
2 \(15.5 \times 10^{6} \mathrm{~kg}\)
3 \(9.8 \times 10^{5} \mathrm{~kg}\)
4 \(10.5 \times 10^{6} \mathrm{~kg}\)
LAWS OF MOTION (ADDITIONAL)

372199 A rocket is fired vertically from the ground with a resultant vertical acceleration of a \(10 \mathrm{~ms}^{-2}\). Fuel is finished in 1 min and it continues to move up. What is the maximum height reached?

1 \(36.4 \mathrm{~km}\)
2 \(42.3 \mathrm{~km}\)
3 \(48.4 \mathrm{~km}\)
4 \(25.6 \mathrm{~km}\)
LAWS OF MOTION (ADDITIONAL)

372200 The motion of a rocket in upward direction with high speed is based on the principle of conservation of

1 angular momentum
2 kinetic energy
3 linear momentum
4 mass
LAWS OF MOTION (ADDITIONAL)

372201 In a rocket, fuel burns at a the rate of \(1 \mathrm{~kg} / \mathrm{s}\). This fuel is ejected from the rocket with a velocity of \(60 \mathrm{~km} / \mathrm{s}\). The force exerted on the rocket by this is

1 \(60 \mathrm{~N}\)
2 \(600 \mathrm{~N}\)
3 \(6000 \mathrm{~N}\)
4 \(60000 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

372202 A rocket is launched straight up from the surface of the earth. When its altitude is \(\frac{1}{3}\) of
the radius of the earth, its fuel runs out and therefore it coasts. If the rocket has to escape from the gravitational pull the earth, the minimum velocity with which it should coast is (Escape velocity on the surface of the earth is \(11.2 \mathrm{kms}^{-1}\).)

1 \(11.2 \mathrm{kms}^{-1}\)
2 \(10.7 \mathrm{kms}^{-1}\)
3 \(9.7 \mathrm{kms}^{-1}\)
4 \(8.7 \mathrm{kms}^{-1}\)
LAWS OF MOTION (ADDITIONAL)

372203 A rocket is about to launch upwards from its platform. The engine ejects gas at a rate of \(2100 \mathrm{~kg} / \mathrm{s}\) and the molecules are expelled at 50 \(\mathrm{km} / \mathrm{s}\). If the above condition is just sufficient to make it rise upwards the mass of the rocket is (Assume \(g=10 \mathrm{~m} / \mathrm{s}^{2}\) )

1 \(12.6 \times 10^{5} \mathrm{~kg}\)
2 \(15.5 \times 10^{6} \mathrm{~kg}\)
3 \(9.8 \times 10^{5} \mathrm{~kg}\)
4 \(10.5 \times 10^{6} \mathrm{~kg}\)
LAWS OF MOTION (ADDITIONAL)

372199 A rocket is fired vertically from the ground with a resultant vertical acceleration of a \(10 \mathrm{~ms}^{-2}\). Fuel is finished in 1 min and it continues to move up. What is the maximum height reached?

1 \(36.4 \mathrm{~km}\)
2 \(42.3 \mathrm{~km}\)
3 \(48.4 \mathrm{~km}\)
4 \(25.6 \mathrm{~km}\)
LAWS OF MOTION (ADDITIONAL)

372200 The motion of a rocket in upward direction with high speed is based on the principle of conservation of

1 angular momentum
2 kinetic energy
3 linear momentum
4 mass
LAWS OF MOTION (ADDITIONAL)

372201 In a rocket, fuel burns at a the rate of \(1 \mathrm{~kg} / \mathrm{s}\). This fuel is ejected from the rocket with a velocity of \(60 \mathrm{~km} / \mathrm{s}\). The force exerted on the rocket by this is

1 \(60 \mathrm{~N}\)
2 \(600 \mathrm{~N}\)
3 \(6000 \mathrm{~N}\)
4 \(60000 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

372202 A rocket is launched straight up from the surface of the earth. When its altitude is \(\frac{1}{3}\) of
the radius of the earth, its fuel runs out and therefore it coasts. If the rocket has to escape from the gravitational pull the earth, the minimum velocity with which it should coast is (Escape velocity on the surface of the earth is \(11.2 \mathrm{kms}^{-1}\).)

1 \(11.2 \mathrm{kms}^{-1}\)
2 \(10.7 \mathrm{kms}^{-1}\)
3 \(9.7 \mathrm{kms}^{-1}\)
4 \(8.7 \mathrm{kms}^{-1}\)
LAWS OF MOTION (ADDITIONAL)

372203 A rocket is about to launch upwards from its platform. The engine ejects gas at a rate of \(2100 \mathrm{~kg} / \mathrm{s}\) and the molecules are expelled at 50 \(\mathrm{km} / \mathrm{s}\). If the above condition is just sufficient to make it rise upwards the mass of the rocket is (Assume \(g=10 \mathrm{~m} / \mathrm{s}^{2}\) )

1 \(12.6 \times 10^{5} \mathrm{~kg}\)
2 \(15.5 \times 10^{6} \mathrm{~kg}\)
3 \(9.8 \times 10^{5} \mathrm{~kg}\)
4 \(10.5 \times 10^{6} \mathrm{~kg}\)
LAWS OF MOTION (ADDITIONAL)

372199 A rocket is fired vertically from the ground with a resultant vertical acceleration of a \(10 \mathrm{~ms}^{-2}\). Fuel is finished in 1 min and it continues to move up. What is the maximum height reached?

1 \(36.4 \mathrm{~km}\)
2 \(42.3 \mathrm{~km}\)
3 \(48.4 \mathrm{~km}\)
4 \(25.6 \mathrm{~km}\)
LAWS OF MOTION (ADDITIONAL)

372200 The motion of a rocket in upward direction with high speed is based on the principle of conservation of

1 angular momentum
2 kinetic energy
3 linear momentum
4 mass
LAWS OF MOTION (ADDITIONAL)

372201 In a rocket, fuel burns at a the rate of \(1 \mathrm{~kg} / \mathrm{s}\). This fuel is ejected from the rocket with a velocity of \(60 \mathrm{~km} / \mathrm{s}\). The force exerted on the rocket by this is

1 \(60 \mathrm{~N}\)
2 \(600 \mathrm{~N}\)
3 \(6000 \mathrm{~N}\)
4 \(60000 \mathrm{~N}\)
LAWS OF MOTION (ADDITIONAL)

372202 A rocket is launched straight up from the surface of the earth. When its altitude is \(\frac{1}{3}\) of
the radius of the earth, its fuel runs out and therefore it coasts. If the rocket has to escape from the gravitational pull the earth, the minimum velocity with which it should coast is (Escape velocity on the surface of the earth is \(11.2 \mathrm{kms}^{-1}\).)

1 \(11.2 \mathrm{kms}^{-1}\)
2 \(10.7 \mathrm{kms}^{-1}\)
3 \(9.7 \mathrm{kms}^{-1}\)
4 \(8.7 \mathrm{kms}^{-1}\)
LAWS OF MOTION (ADDITIONAL)

372203 A rocket is about to launch upwards from its platform. The engine ejects gas at a rate of \(2100 \mathrm{~kg} / \mathrm{s}\) and the molecules are expelled at 50 \(\mathrm{km} / \mathrm{s}\). If the above condition is just sufficient to make it rise upwards the mass of the rocket is (Assume \(g=10 \mathrm{~m} / \mathrm{s}^{2}\) )

1 \(12.6 \times 10^{5} \mathrm{~kg}\)
2 \(15.5 \times 10^{6} \mathrm{~kg}\)
3 \(9.8 \times 10^{5} \mathrm{~kg}\)
4 \(10.5 \times 10^{6} \mathrm{~kg}\)