A Particle That Is Subjected to a Variable Force Travels

question 46

Multiple Choice

A particle that is subjected to a variable force travels a distance of 20 m in a straight line in the same direction as the force.The force varies as follows: What was the total work done by this force during the full 20-m trip?

• A)15 J
• B)30 J
• C)45 J
• D)60 J
• E)75 J

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Definitions:

Frictional Energy

The energy that is generated by the friction between two surfaces moving against each other, often converted into heat.

Rotor Surface

The outer surface of a rotor, in systems like disc brakes, where frictional force is applied to slow down or stop the vehicle.

Cast Iron

A group of iron-carbon alloys with a relatively high carbon content, noted for their strength, wear resistance, and ability to withstand high temperatures.

Brake Rotors

The disc, most commonly made of cast iron, against which the caliper clamps the brake pads to slow the vehicle.