Advertisements
Advertisements
प्रश्न
Why does a gunman get a jerk on firing a bullet ?
Advertisements
उत्तर
When a bullet is fired from a gun, the force pushing the bullet forward is equal to the force pushing the gun backward. However, because of the high mass of the gun, it moves only a little distance backward and gives a backward jerk or kick to the shoulder of the gunman.
APPEARS IN
संबंधित प्रश्न
Explain, why is it difficult for a fireman to hold a hose, which ejects large amounts of water at a high velocity.
A stone of 1 kg is thrown with a velocity of 20 m s−1 across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?
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 ?
Fill in the following blanks with suitable words :
Forces in a Newton’s third law pair have equal _____________ but act in opposite _____________.
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.
“Wearing helmet and fastening the seat belt is highly recommended for safe journey” Justify your answer using Newton’s laws of motion.
A book is resting on a table. Which of the following is the correct reaction force to the gravitational pull of the Earth on the book?
Can action and reaction forces be noncontact forces?
What is the main characteristic of action and reaction forces?
