You stand on a scale that rests on the floor of an elevator that is accelerating upward. What is the relationship between the force due to gravity

A. N > mg

B. N = mg

C. N
D. N = 0


A. N > mg

Physics & Space Science

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A man pushes against a rigid, immovable wall. Which of the following is the most accurate statement concerning this situation?

A) The man can never exert a force on the wall which exceeds his weight. B) If the man pushes on the wall with a force of 200 N, we can be sure that the wall is pushing back with a force of exactly 200 N on him. C) Since the wall cannot move, it cannot exert any force on the man. D) The man cannot be in equilibrium since he is exerting a net force on the wall. E) The friction force on the man's feet is directed to the left.

Physics & Space Science

Folded rock layers that resemble a trough are called

a. anticlines. b. inclines. c. synclines. d. paraclines.

Physics & Space Science

A car is moving in the positive direction along a straight highway and accelerates at a constant rate while going from point A to point B. If the acceleration is positive, increasing the speed of the car, when does the position where the average speed equals the instantaneous speed occur during the time interval from A to B? Assume the time interval is T

a. T/2 from the start of the interval c. after T/2 from the start of the interval b. before T/2 from the start of the interval d. It depends on the speed at the start of the time interval.

Physics & Space Science

Electromagnetic radiation with a wavelength of 700 nm would be:

A) X-rays. B) red light. C) violet light. D) ultraviolet light. E) microwaves.

Physics & Space Science