BJU PS -2nd Trimester Exam

The rate of doing work

• Mechanical Work

• Power

• Simple Machine

• Mechanical Advantage

A measure of the reduction in effort to do a certain amount of work with a simple machine

• Mechanical Work

• Simple Machine

• Mechanical Advantage

• Power

A basic mechanical device that reduces effort when doing a certain amount of work.

• Mechanical Work

• Simple Machine

• Mechanical Advantage

• Power

What is the unit for work?

• Newton

• Watt

• Joule

• None of these

What is the unit for power?

• Newton

• Watt

• Joule

• None of these

Which of the following is not classified as a simple machine?

• Wheels and axles

• Levers

• Inclined Planes

• All of these are simple machines

A simple machine that can be modeled as a rigid bar that pivots about a fulcrum to exert an effort torque

• Wheel and axle

• Lever

• Inclined Plane

• Fulcrum

The point in which a lever pivots or rotates

• Wheel and axle

• Lever

• Inclined Plane

• Fulcrum

A wheel with teeth on its perimeter that mesh with similar teeth of other wheels with teeth to do work producing motion

• Gear

• Pulley

• Torque

• Wheel and axle

Any rotational mechanical system having unrestricted range of motion

• Gear

• Pulley

• Torque

• Wheel and axle