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Q 1/10
Score 0
In terms of impulse and momentum, how does an airbag in a car reduce the risk of serious injury during a collision?
30
It reduces the time of impact so that the force is applied over a shorter duration.
It increases the time over which the change in momentum occurs, thereby decreasing the impact force.
It increases the final momentum of the passenger to counteract the force of the steering wheel.
It decreases the total change in momentum required to bring the passenger to a stop.
Q 2/10
Score 0
When a gymnast lands on a thick mat instead of a hard floor, which of the following physics principles best explains why this prevents injury to their joints?
30
The mat increases the duration of the impact, which reduces the magnitude of the force exerted on the body.
The mat increases the force of gravity to help the gymnast stabilize faster.
The mat eliminates the total impulse required to bring the gymnast to a stop.
The mat reduces the gymnast's initial momentum before they touch the ground.
10 questions
Q.
In terms of impulse and momentum, how does an airbag in a car reduce the risk of serious injury during a collision?
1
30 sec
Q.
When a gymnast lands on a thick mat instead of a hard floor, which of the following physics principles best explains why this prevents injury to their joints?
2
30 sec
Q.
An athlete wearing high-quality running shoes experiences less joint pain because the cushioned soles affect the physics of each stride. Which statement correctly explains this benefit using the concept of impulse?
3
30 sec
Q.
4
30 sec
Q.
Working at a construction site, a worker accidentally drops a heavy tool. If the tool is caught by a safety net rather than hitting the hard concrete, how does the net contribute to safety regarding the change in momentum?
5
30 sec
Q.
If a passenger in a vehicle is not wearing a seatbelt during a sudden braking maneuver, their body continues to move forward due to inertia until a force stops it. Why is hitting a dashboard much more dangerous than being stopped by a seatbelt or airbag in terms of physics?
6
30 sec
Q.
A martial artist is taught to 'pull back' or move with a punch while being hit to reduce the risk of injury. In terms of physics, why is this an effective safety technique?
7
30 sec
Q.
In the design of modern bicycle helmets, a layer of expandable polystyrene (foam) is used. How does this material contribute to head safety during an impact from a physics perspective?
8
30 sec
Q.
In safety engineering, why is catching a falling object with a 'soft' catch (pulling your hands down as you catch it) safer for your hands than keeping them rigid? Use the impulse-momentum principle to identify the correct reason.
9
30 sec
Q.
When jumping from a height to the ground, why are we taught to bend our knees upon landing rather than keeping our legs straight?
