Advertisements
Advertisements
Question
“Wearing helmet and fastening the seat belt is highly recommended for safe journey” Justify your answer using Newton’s laws of motion.
Advertisements
Solution
During the motion of car and two-wheelers, when the brakes are applied, the vehicles slow down but our body tends to continue in the same state of motion due to inertia. So this may cause injury to passengers. Hence they are advised to wear a helmet and seat belt.
APPEARS IN
RELATED QUESTIONS
If action is always equal to the reaction, explain how a horse can pull a cart.
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?
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?
Fill in the following blanks with suitable words :
Forces in a Newton’s third law pair have equal _____________ but act in opposite _____________.
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 ?
According to the third law of motion, action and reaction :
While catching a cricket ball the fielder lowers his hands backwards. Why?
