A 50-Kg Mass Sits on the Floor of an Elevator That

question 46

Multiple Choice

A 5.0-kg mass sits on the floor of an elevator that has a downward acceleration of 1.0 m/s². On top of the 5.0-kg mass is an object of unknown mass. The force of the elevator on the 5.0-kg mass is 80 N up. Determine the unknown mass.

• A) 3.3 kg
• B) 2.4 kg
• C) 1.6 kg
• D) 4.1 kg
• E) 5.0 kg

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Definitions:

Decelerometer

Measures the change in angle of a chassis when it is subjected to aggressive braking. This angle is also known as load transfer, dynamic pitch.

Inclinometer

Used to make angular measurements on driveline components and drivelines; may use a liquid level, laser, or electronic operating principle.

Chassis

The base frame of a vehicle but the term is often used to describe the complete vehicle.

Friction Facings

Materials attached to the surface of clutch and brake components to enhance friction and improve the transfer of force.