मराठी

Name the Principle on Which a Rocket Works. - Science

Advertisements
Advertisements

प्रश्न

Name the principle on which a rocket works.

एका वाक्यात उत्तर

उत्तर

A rocket works on the principle of conservation of momentum.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Force and Laws of Motion - Very Short Answers 2 [पृष्ठ ७४]

APPEARS IN

लखमीर सिंह Physics (Science) [English] Class 9 ICSE
पाठ 2 Force and Laws of Motion
Very Short Answers 2 | Q 9 | पृष्ठ ७४

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

Two billiard balls, each of mass 0.05 kg, moving in opposite directions with speed 6 ms-1collide and rebound with the same speed. What is the impulse imparted to each ball due to the other?


Figure shows the position-time graph of a body of mass 0.04 kg. Suggest a suitable physical context for this motion. What is the time between two consecutive impulses received by the body ? What is the magnitude of each impulse ?


What is the SI unit of momentum ?


Explain the meaning of the following equation : .
p = m x v
where symbols have their usual meanings.


Define momentum of a body. On what factors does the momentum of a body depend ?


Why are car seat-belts designed to stretch some what in a collision ?


Why would an aircraft be unable to fly on the moon ?


A heavy car A of mass 2000 kg travelling at 10 m/s has a head-on collision with a sports car B of mass 500 kg. If both cars stop dead on colliding, what was the velocity of car B ?


Two billiard balls A and B, each of mass 50 g and moving in opposite directions with speed of 5 ms–1 each, collide and rebound with the same speed. If the collision lasts for 10–3 s, which of the following statements are true?

  1. The impulse imparted to each ball is 0.25 kg ms–1 and the force on each ball is 250 N.
  2. The impulse imparted to each ball is 0.25 kg ms–1 and the force exerted on each ball is 25 × 10–5 N.
  3. The impulse imparted to each ball is 0.5 Ns.
  4. The impulse and the force on each ball are equal in magnitude and opposite in direction.

A monkey of mass 20 kg rides on a 40 kg trolley moving with constant speed of 8 m/s along a horizontal track If the monkey jumps vertically to grab the overhanging branch of a tree, the speed of the trolley after the monkey has jumped off is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×