Propulsion force of a rocket is____________________?

Related Mcqs:

1. The thrust on the rocket in the absence of gravitational force of attraction is__________________?

   A. Constant
   B. not constant
   C. constant if the rate of ejected gases is constant
   D. constant for short range rocket.

2. A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes up to 2 in height further, find the magnitude of the force. Consider g = 10m/s 2

   A. 22N
   B. 16N
   C. 20N
   D. 4N

   Submitted by: Huzaifa Naseer

3. Work done by the force of friction is____________________?

   A. always positive
   B. always negative
   C. positive only for small frictional force
   D. positive only for large frictional force

4. The dimension of force is____________________?

   A. MLT-2
   B. ML2T-2
   C. ML2T2
   D. ML-2T-2

5. A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is____________________?

   A. The extension of the wire is proportional to the force applied
   B. The weight of the wire is negligible
   C. The wire is not stretched beyond its elastic limit
   D. The cross sectional area of the wire remains constant

6. Taking off rocket can be explained by __________________?

   A. 1st law of motion
   B. 2nd law of motion
   C. Law of conservation of momentum
   D. law of conservation of energy

7. Flight of a rocket in the space is an example of______________________?

   A. second law of motion
   B. third law of motion
   C. first law of motion
   D. law of gravitation

8. The acceleration in the rocket at any instant is proportional to the nth power of the velocity of the expelled gases. Where the value of n must be ?

   A. -1
   B. 1
   C. 2
   D. -2

9. Coercive force is the force which opposes ____________________?

   A. Demagnetization
   B. Breakage
   C. Extension
   D. Surface cracking

10. Two identical metal balls with charges + 2Q and – Q are separated by some distance, and exert a force F on each other. They are joined by a conducting wire, which is then removed. The force between them will now be_________?

    A. F
    B. F/2
    C. F/4
    D. F/8

    Submitted by: Tauseef Ali