Work and Energy Concepts

What type of energy is primarily increased as the pole vaulter runs down the runway?

• Gravitational potential energy

• Thermal energy

• Elastic potential energy

• Kinetic energy

In a force versus displacement graph, what does the area under the curve represent?

• The potential energy

• The work done

• The total displacement

• The total force applied

What is the relationship between work and energy in a system?

• Work is always greater than energy

• Work and energy are equivalent

• Work and energy are unrelated

• Work is always less than energy

If a bus is at rest and a force is applied to it, what type of energy is primarily added to the system?

• Potential energy

• Kinetic energy

• Sound energy

• Thermal energy

What happens to the kinetic energy of a bus if it starts from rest and work is done on it?

• It increases

• It decreases

• It remains zero

• It becomes negative

How can you calculate the work done when a force is applied at an angle?

• By using the sine of the angle

• By using the cosine of the angle

• By using the tangent of the angle

• By using the secant of the angle

What is the formula for calculating work done on an object?

• Work = Force x Displacement

• Work = Mass x Acceleration

• Work = Velocity x Time

• Work = Force x Time

What is the significance of a parallel force in the context of work?

• It decreases the displacement

• It reduces friction

• It ensures maximum work is done

• It increases the potential energy

In the block example, what shape is used to calculate the work done when the force decreases to zero?

• Circle

• Rectangle

• Triangle

• Trapezoid

In the context of the block example, what type of energy is primarily discussed?

• Kinetic energy

• Potential energy

• Chemical energy

• Thermal energy