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प्रश्न
Is the following statement true or false :
A rocket can propel itself in a vacuum.
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उत्तर
The given statement is true. A rocket propulsion system works on the principle of conservation of momentum.
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संबंधित प्रश्न
According to the third law of motion, when we push on an object, the object pushes back on us with an equal and opposite force. If the object is a massive truck parked along the roadside, it will probably not move. A student justifies this by answering that the two opposite and equal forces cancel each other. Comment on this logic and explain why the truck does not move.
What is the force which produces an acceleration of 1 m /s2 in a body of mass 1 kg ?
A girl weighing 25 kg stands on the tloor. She exerts a downward force of 250 N on the floor. What force does the floor exert on her ?
Fill in the following blanks with suitable words :
Forces in a Newton’s third law pair have equal _____________ but act in opposite _____________.
If action is always equal to reaction, explain why a cart pulled by a horse can be moved.
Explain how a rocket works.
Why is it difficult to walk on a slippery road ?
Name the law involved in the following situation :
when person A standing on roller skates pushes another person B (also standing on roller skates) and makes him move to the right side, then the person A himself gets moved to the left side by an equal distance.
State Newton’s third law of motion and give two examples to illustrate the law.
Give a scientific reason.
Even though the magnitudes of action force and reaction forces are equal and their directions are opposite, their effects do not get cancelled.
