Understanding Check: Work and Power

Arjun pushes a box across the floor with a constant force. Which of the following best defines the "work" Arjun does in physics?

Benjamin is measuring the rate at which his new blender uses energy while making a smoothie. What is the SI unit of power that Benjamin should use to record this measurement?

Scarlett pushes a box with a constant force in the direction it moves. Which of the following is the correct formula to calculate the work done by Scarlett?

Anika pushes a box with a force of $$10\,N$$ and moves it $$5\,m$$ in the direction of the force. How much work does Anika do?

Emma lifts a box onto a shelf and wants to understand the difference between work and power. Which of the following statements correctly compares work and power?

A student lifts a $$20\,N$$ box to a shelf $$2\,m$$ high in $$4$$ seconds. What is the power used by the student?

Elijah uses a machine to lift boxes and the machine does $$200\,J$$ of work in (a)   .​

A person pushes a cart with a force of $$30\,N$$ over a distance of $$4\,m$$ in $$6$$ seconds. Calculate the power developed by the person.

Emma and Michael each carry boxes up a flight of stairs, doing $$100\,J$$ of work. Emma completes the task in $$5$$ seconds, while Michael takes $$10$$ seconds. Who has the greater power output, and by how much?

Match the following scenarios with the correct power output of the motor.