Taking off rocket can be explained by __________________?

Related Mcqs:

1. 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

2. 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

3. 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.

4. Propulsion force of a rocket is____________________?

   A. non-conservative force
   B. conservative force
   C. both A and B
   D. none of these

5. During long jump, athlete runs before taking the jump. By doing so he__________________?

   A. provide him a larger inertia
   B. decreases his inertia
   C. decreases his momentum
   D. increases his momentum

6. A body is falling freely under gravity. How much distance it falls during an interval of time between 1st and 2nd seconds of its motion, taking g=10 ?

   A. 15 m
   B. 20 m
   C. 5 m
   D. 25 m

7. It is possible to distinguish between transverse and longitudinal waves form the property of __________________?

   A. refraction
   B. polarization
   C. interference
   D. diffraction

8. An immersion heater of 400 watts kept on for 5 hours will consume electrical power of __________________?

   A. 2KWh
   B. 20KWh
   C. 6KWh
   D. 12KWh

9. Strontium-90 is used as __________________?

   A. α-particle source
   B. β-particle source
   C. γ-rays source
   D. Neutron source

10. The anti-matter is composed of: __________________?

    A. Anti-electrons
    B. Anti-proton
    C. Anti-neutron
    D. All of these 

    Submitted by: Rizwan Ayub Saadi