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Since the force acting on both before the collision and just after is equal,
So, the impulse is equal for both
Impulse = 77 x 56 x(1000/3600) = 1197.78 kg.m/s
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According to Newton’s first law” An object at rest remain at rest and an object in motion continues in
motion unless acted on by a nonzero net force, so, both the driver and passenger dummies will continue
moving just after the collision with the constant velocity due to inertia unless it’s acted upon by nonzero
net force or unless there is an unbalanced force that acts on it, The belt will act as a tension force pulling
the driver and prevent him from injury due to flying, hitting the dashboard, or the windshield, the
passenger dummy will continue moving until force oct to stop him, as reaction force from hitting the
dashboard, or the windshield or his on weight. And this takes a slight time difference.
That’s why the areas under both graphs are the same (which equal the impulse but since the impulse =
force x time, that’s why the graphs are different.
Since the force = m ∆v/∆t, so to decrease this force to reduce the severity we have the velocity and time,
According to the equation above, we will notice that decreasing the velocity will decrease the force also
increases the time will decrease the force that’s why they trying to improve the front part of the vehicles
and airbag.