Quiz on Work and Kinetic Energy

What is the definition of 'Work' in physics?

• The energy stored in a spring

• The total energy of an object at rest

• The energy transferred by a force acting over a distance

• The energy required to lift an object

How is work calculated when force and displacement are in opposite directions?

• Work is always constant

• Work is zero

• Work is negative

• Work is positive

What does the Work-Energy Theorem state?

• Work done is independent of displacement

• Work done is equal to the mass of the object

• Work done is equal to the force applied

• Work done is equal to the change in kinetic energy

What is the unit of work in the International System of Units?

• Joule

• Newton

• Watt

• Pascal

What is the formula for calculating average power?

• Distance divided by time

• Work done divided by time

• Force multiplied by velocity

• Energy divided by mass

What happens to the work done when the force is perpendicular to the displacement?

• Work is maximum

• Work is zero

• Work is negative

• Work is positive

In the context of springs, what does Hooke's Law state?

• The force exerted by a spring is proportional to its extension

• The spring force is independent of its length

• The energy stored in a spring is always zero

• The work done on a spring is constant

What is instantaneous power?

• The average power over a time interval

• The maximum force applied

• The limit of average power as time approaches zero

• The total work done in a system

What is the relationship between work and kinetic energy?

• Work done is equal to the change in potential energy

• Work done is independent of kinetic energy

• Work done is always negative

• Work done is equal to the change in kinetic energy

When multiple forces act on an object, how can the total work be calculated?

• By calculating the maximum force only

• By averaging the forces applied

• By summing the work done by each force separately

• By ignoring the direction of forces