A 12,000-N Car Is Raised Using a Hydraulic Lift, Which

question 1

Multiple Choice

A 12,000-N car is raised using a hydraulic lift, which consists of a U-tube with arms of unequal areas, filled with oil and capped at both ends with tight-fitting pistons. The wider arm of the U-tube has a radius of 18.0 cm and the narrower arm has a radius of 5.00 cm. The car rests on the piston on the wider arm of the U-tube. The pistons are initially at the same level. What is the initial force that must be applied to the smaller piston in order to start lifting the car? For purposes of this problem, neglect the weight of the pistons.

• A) 727 N
• B) 926 N
• C) 2900 N
• D) 3330 N
• E) 1.20 kN

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Definitions:

Motor Neuron

A type of neuron that sends impulses from the brain or spinal cord to a muscle or gland, enabling movement and action.

Nerves

Bundled axons that form neural cables connecting the central nervous system with muscles glands, and sense organs.

Axons

The long, slender projections of a neuron that transmit electrical impulses away from the neuron's cell body to other neurons, muscles, or glands.

Interneurons

Neurons located in the central nervous system that process and relay information between sensory neurons and motor neurons.