Person in an Elevator Moving Downward Scale Weight

A Calculate the scale reading in newtons and compare it with his weight. A bat hitting a ball projects the ball because the bat accelerated to a significant non-zero velocity before impact.

Esm Walker Physics 2 Newton S Laws Of Motion Problem Sets Ranking Task Exercises

Dynamics is the study of how forces affect the motion of objects whereas kinematics simply describes the way objects move.

. Some extra attention is. The scale exerts an upward force on him equal to its reading b What is unreasonable about the result. Force is a push or pull that can be defined in terms of various standards and it is a vector that has both magnitude and direction.

Im having trouble understanding why this would be the case. Unreasonable Results A 750-kg man stands on a bathroom scale in an elevator that accelerates from rest to 300 ms in 200 s. They would be in projectile motion under gravity until they hit the ceiling of the elevator.

The solution to the previous example also applies to an elevator accelerating downward as mentioned. I read a problem about a person is standing on a scale in an elevator. If a constant downward velocity is reached the scale reading again becomes equal to the persons weight.

When I read the answer there was an explanation saying that when the acceleration of the elevator goes upward the normal force is bigger than the persons weight and when it goes downward its smaller. I dont understand your ideas about normal forces. When an elevator accelerates downward a is negative and the scale reading is less than the weight of the person.

In this Lesson The Physics Classroom differentiates between the various types of forces that an object could encounter. A force is a push or pull that acts upon an object as a result of that objects interactions with its surroundings. If the elevator suddenly stopped the person would keep moving by Newtons first law.

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