Advertisements
Advertisements
प्रश्न
If action is always equal to the reaction, explain how a horse can pull a cart.
उत्तर
A horse pushes the ground in the backward direction. According to Newton’s third law of motion, a reaction force is exerted by the Earth on the horse in the forward direction. As a result, the cart moves forward.
APPEARS IN
संबंधित प्रश्न
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.
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 ?
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.
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.
Complete a sentence and explain it.
The working of a rocket depends on Newton's ______ law of motion.
While catching a cricket ball the fielder lowers his hands backwards. Why?
According to the third law of motion, action and reaction
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]
