Advertisements
Advertisements
प्रश्न
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.
उत्तर
When two bodies interact, the action and reaction forces come into action. Even though their magnitude is the same and their direction is opposite, their effects do not get cancelled because these action and reaction forces do not act on the same body.
APPEARS IN
संबंधित प्रश्न
If action is always equal to the reaction, explain how a horse can pull a cart.
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?
Using a horizontal force of 200 N, we intend to move a wooden cabinet across a floor at a constant velocity. What is the friction force that will be exerted on the cabinet?
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.
Is the following statement true or false :
A rocket can propel itself in a vacuum.
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 _____________.
Why does a gunman get a jerk on firing a bullet ?
If action is always equal to reaction, explain why a cart pulled by a horse can be moved.
Explain how a rocket works.
Do action and reaction act on the same body or different bodies ? How are they related in magnitude and direction ? Are they simultaneous or not ?
Why is it difficult to walk on a slippery road ?
Draw a diagram to show how a rocket engine provides a force to move the rocket upwards. Label the diagram appropriately.
According to the third law of motion, action and reaction :
Give scientific reasons.
It is easier to stop a tennis ball as compared to a cricket ball when both are travelling with the same velocity.
While catching a cricket ball the fielder lowers his hands backwards. Why?
“Wearing helmet and fastening the seat belt is highly recommended for safe journey” Justify your answer using Newton’s laws of motion.
According to the third law of motion, action and reaction