# A60-kg person is traveling in a car moving at 16 m/s, when the car hits a barrier. the person is not wearing a seat belt,

A60-kg person is traveling in a car moving at 16 m/s, when the car hits a barrier. the person is not wearing a seat belt, but is stopped by an air bag in a time interval of 0.20 s. determine the average force that the air bag exerts on the person?

## This Post Has 3 Comments

1. sleimanabir says:

Using conservation of momentum, we can solve for the force that the air bag exerts on the person.

Recall the equation for momentum (p):

$p = mv = F*dt$

We can solve for total momentum, then divide by out time interval. This gets us:

$(60kg)(16m/s) = F(0.2s)&10;&10;&#10;F = 4800N$

F = 4800N

2. Expert says:

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

3. Expert says:

d. air pressure decreases as altitude increases.