A briefcase sits stationary in an elevator. The mass of the briefcase if 4.5 kg. The elevator then begins accelerating upwards at 1.10 m/s^2. What is the normal force on this briefcase during this acceleration?
44.155 N
38.971 N
51.141 N
48.985 N

In an elevator that is accelerating upwards, you normally feel heavier.This explains that the formal force equals the sum of your weight and that generated by your mass and acceleration due to gravity.The same applies to the briefcase.

Normal force/supporting force=mass*acceleration +weight

F=4.5kg*1.10m/s² + 4.5*9.8 kg where g is acceleration due to gravity,9.8 m/s²

F=4.95 N + 44.1 N

F=49.05

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Keywords :Elevator , accelerating upwards, normal force

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A briefcase sits stationary in an elevator. The mass of the briefcase if 4.5 kg. The elevator then begins accelerating upwards at 1.10 m/s^2. What is the normal force on this briefcase during this acceleration? 44.155 N 38.971 N 51.141 N 48.985 N

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A briefcase sits stationary in an elevator. The mass of the briefcase if 4.5 kg. The elevator then begins accelerating upwards at 1.10 m/s^2. What is the normal force on this briefcase during this acceleration?
44.155 N
38.971 N
51.141 N
48.985 N