Launching Satellites

Q. When is the clamp of a rocket removed?

1. Before initiating the ignition
2. Clamp breaks automatically during the launch
3. After the launch
4. When upthrust is more than the weight.

Q. Why are mulistage rockets used?

1. Reduce air friction
2. Reduce cost of the project
3. To reduce the time of flight
4. To improve the performance of the guidance system

Q. What should be the direction of the movement of propellers in a quadcopter?
And what can be the max. weight 4small size motor can withstand and make it fly(quadcopter).
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Q. What is the principle on which a rocket works?

1. Conservation of energy
2. Newton's third law
3. Conservation of mass
4. Archimedes principle

Q. Which was India's first artificial satellite launched into space?

1. Sputnik
2. Aryabhatta
3. Bhaskara
4. EDUSAT

Q. Which of the following are the applications of artificial satellites?

1. Weather forecasting
2. Telecommunication
3. Remote sensing
4. Locating ground water

Q.

What is the S.I. unit of force?

1. watt-hour

2. joule

3. kelvin

4. newton