Work and Power Answers

A lawnmower engine running for 20 min does 4,560,000 J of work. What is the power output of the engine? (Power: P = W/t)

Sierra did 500 J of work to move her couch. If she exerts 250 N of force on the couch, how far did she move it? (Work: W = Fd)

Joshua programs a robotic arm to place a block in a box by following the sequence of commands in the table.During which step does the robotic arm do work on the block?

Shani poses as the Statue of Liberty for an art class. She holds a torch above her head with her right hand and a book against her side with her left hand. She holds the pose for ten minutes. At the end of the session, she mentions to her friend that it was a lot of work to pose and that her arms are really tired.Which describes the work Shani did while she posed?(assume the starting work position is when her hand is already raised )

Force and distance are used to calculate work. Work is measured in which unit?

Four students were loading boxes of food collected during a food drive. The force that each student exerted while lifting and the distance each box was lifted are listed in the table.Which lists the students in order from the greatest amount of work done to the least? (Work: W = Fd)

During a workout, a football player pushes a blocking dummy a distance of 30 m. While pushing the dummy the same distance a second time, what would the player need to change to be certain that power output increases?

If 600 J of work is done in 3 s, what is the power? (Power: P = W/t)

Pablo prepares to lift a barbell. During which stage of the lift does Pablo do work on the barbell?

Den pushes a desk 400 cm across the floor. He exerts a force of 10 N for 8 s to move the desk.What is his power output? (Power: P = W/t)