Question

Human brain gets injured if its acceleration reaches 1000 ms-even for a small interval of time. A car runs into a solid barrier. With an airbag, the driver's head moves through a distance of 20 cm while the airbag stops it. Find the maximum speed with which the car can strike the barrier without injuring the brain :

(1) 10 m/s

(3) 25 m/s

(2) 20 m/s

(4) 5 m/s.​

Answer 1

Answer:

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Step-by-step explanation:

Answer: A, C, and D

Momentum can be thought of as mass in motion. An object has momentum if it has its mass in motion. It matters not whether the object is of large mass or small mass, moving with constant speed or accelerating; if the object is MOVING, then it has momentum!

Answer 2

Answer:use the formula v^2-u^2=2as

Step-by-step explanation: