Question

multiple - choice questions
assigned
2
written - response question
#1
assigned
3
written - response question
#2
assigned

1. engineers are designing a new car and they need to test their ideas by modeling crashes with different types of

crash 1 and a less massive pickup truck for crash 2. the green
test car has the same mass in both crashes. use information from the diagram to answer.
in which crash did the green test car experience a stronger force? how do you know?
a crash 1: the force on the garbage truck was stronger in this crash, so the force on the green test car was also
stronger.
b there is no force on the green car. in each crash, only the truck experienced a force.
c it was the same from both crashes. the trucks changed speed by the same amount in both crashes, so the
force on the test car was the same both times.
d the diagram doesnt tell you anything about the force on the green test car. it only gives information about
the force on the trucks.
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Explanation:

According to Newton's third law of motion, when two objects interact, the forces they exert on each other are equal in magnitude and opposite in direction. In a crash, the force exerted by the truck on the car is equal to the force exerted by the car on the truck. Since the garbage truck is more massive and if we assume (from typical crash - force concepts related to mass and force in collisions, where a more massive object in a collision - like situation where forces are paired) the force on the garbage truck (which is paired with the force on the car) is stronger (due to its mass and the nature of collisions where for a given change in motion, more mass can imply a stronger force in the interaction), then the force on the green test car (which is the reaction force to the force on the truck) is also stronger.

Answer:

A. Crash 1: the force on the garbage truck was stronger in this crash. so the force on the green test car was also stronger.