Work and Energy

The video tutorial introduces the concepts of work and energy in physics, distinguishing them from their common language meanings. Work is defined as the action done on an object when a force causes displacement, measured in joules. The tutorial explains how only the force components parallel to displacement contribute to work. It also covers the work-energy theorem, which links work to changes in kinetic energy, and briefly mentions different types of energy, such as kinetic and potential energy.

In physics, what is the definition of work?

• A place where you earn money

• Action done on an object causing displacement

• Feeling of being tired

• A metaphorical term for good vibes

What is the unit of work in the SI system?

• Watt

• Newton

• Joule

• Meter

When is work considered to be zero?

• When force is applied at an angle

• When the object is moving

• When there is no displacement

• When the force is perpendicular to displacement

What does the work-energy theorem state?

• Energy can neither be created nor destroyed

• Energy is the capacity to do work

• Work is the product of force and distance

• Work done on an object changes its kinetic energy

Which of the following is NOT a type of energy mentioned?

• Potential energy

• Thermal energy

• Kinetic energy

• Magnetic energy