Read the passage about Newton's laws. An eighth-grade science teacher wants to demonstrate Newton's laws. She moves the lab tables to the side of the classroom and sets up two rolling office chairs at the back of the room. She asks one student who weighs 85 pounds to sit in one chair, and another student who weighs 130 pounds to sit in the other chair. The teacher then asks a third student to give each seated student a push with an equal force.If the students are pushed for the same amount of time, which of the following does NOT happen to the students in the office chairs?A The lighter student travels a shorter distance than the heavier student.B The heavier student requires a larger force to stop moving.C Both students thrust forward for a short period of time when the chairs stop.D The lighter student's weight causes more frictional force on the chair.
Question
Read the passage about Newton's laws. An eighth-grade science teacher wants to demonstrate Newton's laws. She moves the lab tables to the side of the classroom and sets up two rolling office chairs at the back of the room. She asks one student who weighs 85 pounds to sit in one chair, and another student who weighs 130 pounds to sit in the other chair. The teacher then asks a third student to give each seated student a push with an equal force.If the students are pushed for the same amount of time, which of the following does NOT happen to the students in the office chairs?A The lighter student travels a shorter distance than the heavier student.B The heavier student requires a larger force to stop moving.C Both students thrust forward for a short period of time when the chairs stop.D The lighter student's weight causes more frictional force on the chair.
Solution
The correct answer is A. The lighter student travels a shorter distance than the heavier student. This statement is not true according to Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Therefore, if the same force is applied to both students, the lighter student will actually travel a greater distance than the heavier student.
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