Car airbag | ProblemHow does a car airbag reduce the force of impact on the person drivingGroup of answer choicesBy instantly changing the linear momentum of the driver to zero.By instantly reversing the direction of linear momentum of the driver.By decreasing the time over which the linear momentum of the driver changes.By increasing the time over which the linear momentum of the driver changes.
Question
Car airbag | ProblemHow does a car airbag reduce the force of impact on the person drivingGroup of answer choicesBy instantly changing the linear momentum of the driver to zero.By instantly reversing the direction of linear momentum of the driver.By decreasing the time over which the linear momentum of the driver changes.By increasing the time over which the linear momentum of the driver changes.
Solution
The correct answer is: By increasing the time over which the linear momentum of the driver changes.
Here's the step-by-step explanation:
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When a car crashes, the driver continues to move forward at the same speed at which the car was moving. This is due to the law of inertia, which states that an object in motion tends to stay in motion unless acted upon by an external force.
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The purpose of an airbag is to provide that external force that will slow down the driver's forward motion to a stop. However, if this force is applied too suddenly, it can cause injury. This is where the concept of linear momentum comes in.
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Linear momentum is the product of the mass of an object and its velocity. In this case, the object is the driver and the velocity is the speed at which the driver is moving forward after the crash.
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If the airbag applies its force over a longer period of time, it gradually reduces the driver's linear momentum, bringing the driver to a stop more gently. This reduces the force of the impact on the driver, which can help prevent injury.
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Therefore, the airbag reduces the force of impact on the driver by increasing the time over which the linear momentum of the driver changes.
Similar Questions
A car traveling at 60 mph (100 km/h) veers off the road and hits a tree. The car immediately comes to a complete stop. Fortunately, the airbag inflates and the driver comes to a stop in the airbag instead of coming to a stop on the steering wheel. Hitting the airbag rather than the steering wheel saves the driver's life because the driver1 pointcarries less force with her before colliding with the airbag than she would have carried with her if there were no airbag.transfers more momentum to the airbag than she would have transferred to the steering wheel.transfers all of her momentum to whatever stops her, but that transfer is slower and involves a smaller force when she hits the airbag.transfers less momentum to the airbag than she would have transferred to the steering wheel.
Like a safety belt, an air bag provides a force to stop a passenger's motion during a car crash. Which best describes how safety belts and air bags protect passengers?Multiple choice question.Both decrease the overall colliding mass, resulting in a smaller force on the passenger.Both increase the time it takes to slow a passenger down, resulting in a smaller force on the passenger.Both decrease the time it takes to slow a passenger down, resulting in a smaller force on the passenger.Both increase the overall colliding mass, resulting in a smaller force on the passenger.
Air bags are designed to deploy only under certain conditions, usually in the event of a __________.Rear end collisionFairly severe frontal collisionMultiple car collisionFender bender
During a car crash at a speed of 30 m/s, a driver with a mass of 60 kg is safely brought to a stop by an airbag in 0.5 seconds. How much force did the airbag absorb?
Air bags are designed to deploy only under certain conditions, usually in the event of a __________.Fender benderFairly severe frontal collisionMultiple car collisionRear end collision
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