A Student Releases a Ball from Rest on an Inclined

question 42

Multiple Choice

A student releases a ball from rest on an inclined plane and measures that it travels a distance of 0.8 m in a time of 4.0 s. The average speed of the ball is

• A) 3.2 m/s.
• B) 1.0 m/s.
• C) 0.2 m/s.
• D) 2.0 m/s.

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Definitions:

Control Coil

An electromagnetic coil used in electrical engineering to control the operation of devices, typically in relays or contactors.

Relay Contact

A component in a relay that opens or closes the electrical circuit it controls, acting as the switching element triggered by the relay.

Ice-cube Relays

Small, plug-in electromechanical relays that resemble the size and shape of an ice cube, used for various control applications.

Arc Chutes

Protective devices designed to extinguish electrical arcs that can occur in switchgear or circuit breakers, by dividing and cooling the arc.