05. System of Varying Mass
Laws of Motion

146360 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/sec at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The accelerating force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146362 The engine of a jet aircraft applies a thrown force of \(10^{5} \mathrm{~N}\) during take off and causes the plane to attain a velocity of \(1 \mathrm{~km} / \mathrm{s}\) in \(10 \mathrm{~s}\). The mass of the plane is

1 \(10^{2} \mathrm{~kg}\)
2 \(10^{3} \mathrm{~kg}\)
3 \(10^{4} \mathrm{~kg}\)
4 \(10^{5} \mathrm{~kg}\)
Laws of Motion

146363 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/s at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The acceleration force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146351 A rocket is intended to leave the Earth's gravitational field. The fuel in its main engine is a little less than the amount that is necessary and an auxiliary engine, (only capable of operating for a short time) has to be used as well. When is it best to switch on the auxiliary engine?

1 at take-off
2 When the rocket has nearly stopped with respect to the Earth
3 It doesn't matter.
4 Can't say
Laws of Motion

146361 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/s at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The accelerating force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146360 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/sec at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The accelerating force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146362 The engine of a jet aircraft applies a thrown force of \(10^{5} \mathrm{~N}\) during take off and causes the plane to attain a velocity of \(1 \mathrm{~km} / \mathrm{s}\) in \(10 \mathrm{~s}\). The mass of the plane is

1 \(10^{2} \mathrm{~kg}\)
2 \(10^{3} \mathrm{~kg}\)
3 \(10^{4} \mathrm{~kg}\)
4 \(10^{5} \mathrm{~kg}\)
Laws of Motion

146363 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/s at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The acceleration force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146351 A rocket is intended to leave the Earth's gravitational field. The fuel in its main engine is a little less than the amount that is necessary and an auxiliary engine, (only capable of operating for a short time) has to be used as well. When is it best to switch on the auxiliary engine?

1 at take-off
2 When the rocket has nearly stopped with respect to the Earth
3 It doesn't matter.
4 Can't say
Laws of Motion

146361 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/s at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The accelerating force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
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Laws of Motion

146360 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/sec at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The accelerating force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146362 The engine of a jet aircraft applies a thrown force of \(10^{5} \mathrm{~N}\) during take off and causes the plane to attain a velocity of \(1 \mathrm{~km} / \mathrm{s}\) in \(10 \mathrm{~s}\). The mass of the plane is

1 \(10^{2} \mathrm{~kg}\)
2 \(10^{3} \mathrm{~kg}\)
3 \(10^{4} \mathrm{~kg}\)
4 \(10^{5} \mathrm{~kg}\)
Laws of Motion

146363 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/s at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The acceleration force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146351 A rocket is intended to leave the Earth's gravitational field. The fuel in its main engine is a little less than the amount that is necessary and an auxiliary engine, (only capable of operating for a short time) has to be used as well. When is it best to switch on the auxiliary engine?

1 at take-off
2 When the rocket has nearly stopped with respect to the Earth
3 It doesn't matter.
4 Can't say
Laws of Motion

146361 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/s at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The accelerating force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146360 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/sec at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The accelerating force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146362 The engine of a jet aircraft applies a thrown force of \(10^{5} \mathrm{~N}\) during take off and causes the plane to attain a velocity of \(1 \mathrm{~km} / \mathrm{s}\) in \(10 \mathrm{~s}\). The mass of the plane is

1 \(10^{2} \mathrm{~kg}\)
2 \(10^{3} \mathrm{~kg}\)
3 \(10^{4} \mathrm{~kg}\)
4 \(10^{5} \mathrm{~kg}\)
Laws of Motion

146363 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/s at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The acceleration force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146351 A rocket is intended to leave the Earth's gravitational field. The fuel in its main engine is a little less than the amount that is necessary and an auxiliary engine, (only capable of operating for a short time) has to be used as well. When is it best to switch on the auxiliary engine?

1 at take-off
2 When the rocket has nearly stopped with respect to the Earth
3 It doesn't matter.
4 Can't say
Laws of Motion

146361 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/s at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The accelerating force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146360 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/sec at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The accelerating force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146362 The engine of a jet aircraft applies a thrown force of \(10^{5} \mathrm{~N}\) during take off and causes the plane to attain a velocity of \(1 \mathrm{~km} / \mathrm{s}\) in \(10 \mathrm{~s}\). The mass of the plane is

1 \(10^{2} \mathrm{~kg}\)
2 \(10^{3} \mathrm{~kg}\)
3 \(10^{4} \mathrm{~kg}\)
4 \(10^{5} \mathrm{~kg}\)
Laws of Motion

146363 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/s at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The acceleration force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)
Laws of Motion

146351 A rocket is intended to leave the Earth's gravitational field. The fuel in its main engine is a little less than the amount that is necessary and an auxiliary engine, (only capable of operating for a short time) has to be used as well. When is it best to switch on the auxiliary engine?

1 at take-off
2 When the rocket has nearly stopped with respect to the Earth
3 It doesn't matter.
4 Can't say
Laws of Motion

146361 Diwali rocket is ejecting \(50 \mathrm{~g}\) of gases/s at a velocity of \(400 \mathrm{~m} / \mathrm{s}\). The accelerating force on the rocket will be

1 22 dyne
2 \(20 \mathrm{~N}\)
3 20 dyne
4 \(100 \mathrm{~N}\)