Per NCERT 'Bridging Science and Society' (§6.5), how do AIRBAGS in vehicles reduce injury during a collision?
AThe airbag increases the time over which the passenger decelerates — reducing the force exerted on the body (F = ma with smaller a)
BAirbags release oxygen
CAirbags absorb sound
DAirbags increase the speed of collision
Answer & Solution
Correct answer: A. The airbag increases the time over which the passenger decelerates — reducing the force exerted on the body (F = ma with smaller a)
Per NCERT §6.5, airbags spread out the deceleration time, reducing the force on the passenger. Same principle as the cricket-catch example.
Related questions
Per NCERT, if you DOUBLE the force on an object (keeping mass constant), what happens to iPer NCERT, what is MOMENTUM of an object — referenced in the 'Ready to Go Beyond' box of §Per NCERT, why does a cricket FIELDER pull their hands BACKWARDS when catching a fast-moviPer NCERT Example 6.5, a student pushes a 25 kg block with 55 N against friction of 50 N. Per NCERT Example 6.4, a 30 kg barbell is held STEADY by a weightlifter. How much UPWARD fPer NCERT, does g (acceleration due to gravity) depend on the MASS of the falling object?Per NCERT, what is the approximate value of g (acceleration due to gravity) near the EarthPer NCERT, the WEIGHT of an object (gravitational force by Earth) is given by which formul