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.
Advertisements
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?
What is the force which produces an acceleration of 1 m /s2 in a body of mass 1 kg ?
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 ?
If a man jumps out from a boat, the boat moves backwards. Why ?
Why is it difficult to walk on a slippery road ?
Explain why, a runner presses the ground with his feet before he starts his run.
Draw a diagram to show how a rocket engine provides a force to move the rocket upwards. Label the diagram appropriately.
State Newton’s third law of motion and give two examples to illustrate the law.
Explain why, when a fireman directs a powerful stream of water on a fire from a hose pipe, the hose pipe tends to go backward.
According to the third law of motion, action and reaction :
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.
Consider a frame that is made up of two thin massless rods AB and AC as shown in the figure. A vertical force `vec"P"` of magnitude 100 N is applied at point A of the frame.
Suppose the force is `vec"P"` resolved parallel to the arms AB and AC of the frame.
The magnitude of the resolved component along the arm AC is xN.
The value of x, to the nearest integer, is ______.
[Given: sin(35°) = 0.573, cos(35°) = 0.819, sin(110°) = 0.939, cos(110°) = –0.342]
Why do the action and reaction forces in a pair not cancel each other out?
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?
What is the main characteristic of action and reaction forces?
