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car crash forces I mg Fe Two identical cars, mass 1.0 tonnes, travelling at 30.0 kph in opposite directions, collide. During the collision, the front of each the cars crumples and becomes 15 cm shorter. So let's say that each car decelerates to rest over 15 cm. What is the magnitude of the average acceleration? a) Magnitude of average acceleration: m.s -2

car crash forces I mg Fe Two identical cars, mass 1.0 tonnes, travelling at 30.0 kph in opposite directions, collide. During the collision, the front of each the cars crumples and becomes 15 cm shorter. So let's say that each car decelerates to rest over 15 cm. What is the magnitude of the average acceleration? a) Magnitude of average acceleration: m.s -2

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4. Car crash forces 1 Two identical cars, mass 1.0 tonnes, travelling at 30.0 kph in opposite directions, collide. During the collision, the front of each the cars crumples and becomes 15 cm shorter. So let's say that each car decelerates to rest over 15 cm. What is the magnitude of the average acceleration? a) Magnitude of average acceleration: m.s-2
Transcribed Image Text:4. Car crash forces 1 Two identical cars, mass 1.0 tonnes, travelling at 30.0 kph in opposite directions, collide. During the collision, the front of each the cars crumples and becomes 15 cm shorter. So let's say that each car decelerates to rest over 15 cm. What is the magnitude of the average acceleration? a) Magnitude of average acceleration: m.s-2
Car crash forces 1 Using the information from #754a above: What is the magnitude of the average external force that produces this acceleration? Magnitude of average external force: kN. Car crash forces 2 In the car that decelerates from 30 kph to rest over 15 cm are two 70 kg passengers. One wears a seatbelt and decelerates over 30 cm (with respect to the ground) (two significant figures). The other is not wearing a seatbelt and decelerates over 5 cm* (with respect to the ground). What are the magnitudes of the average external forces acting on the two passengers during their decelerations? (Careful with significant figures: do both answers have the same precision?) a) With a seatbelt? kN. b) Without a seatbelt? kN. Please separate your answers with a comma. Example: a, b This deceleration occurs when he strikes a part of the car, which is by then stationary. The 5 cm is the passenger's own crumple zone, and this is where the injuries occur.
Transcribed Image Text:Car crash forces 1 Using the information from #754a above: What is the magnitude of the average external force that produces this acceleration? Magnitude of average external force: kN. Car crash forces 2 In the car that decelerates from 30 kph to rest over 15 cm are two 70 kg passengers. One wears a seatbelt and decelerates over 30 cm (with respect to the ground) (two significant figures). The other is not wearing a seatbelt and decelerates over 5 cm* (with respect to the ground). What are the magnitudes of the average external forces acting on the two passengers during their decelerations? (Careful with significant figures: do both answers have the same precision?) a) With a seatbelt? kN. b) Without a seatbelt? kN. Please separate your answers with a comma. Example: a, b This deceleration occurs when he strikes a part of the car, which is by then stationary. The 5 cm is the passenger's own crumple zone, and this is where the injuries occur.
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