A Force Pushes a Block Along a Horizontal Surface Against

question 78

Multiple Choice

A force pushes a block along a horizontal surface against a force of friction . If the block undergoes a displacement at constant velocity, the work done by the resultant force on the block

• A) is equal to the work done by the force of friction .
• B) is given by .
• C) increases the kinetic energy of the block.
• D) increases the potential energy of the block.
• E) is zero.

---

Definitions:

Brake Rotor

A component of disc brakes used in automotive and other applications, designed to provide a friction surface for the brake pads to slow or stop the vehicle.

Contact Area

The surface or region where two objects meet or press against each other, often critical for the transfer of force or heat.

Duo-servo Brakes

A type of drum brake system where each shoe acts as a servo to the other, enhancing braking efficiency, commonly found in heavier vehicles.

Self-energizing

Refers to a mechanism in brake systems where the brake shoes are designed to use the motion of the vehicle to increase the force applied to the drum, enhancing braking efficiency.