Work, Energy, and Power Quiz

When is work done on an object?

• when a force is applied to an object and the object remains stationary
• when a force is applied to an object and the object moves in the same direction as the force
• when the frictional force on an object is greater than a force applied to the object
• when two forces of equal magnitude are applied to the object in opposite directions

Peter does 3,000 joules (J) of work by moving an object 40 meters (m). What is the force that Peter applies to the object?

• 75 N
• 2,960 N
• 3,040 N
• 120,000 N

A robotic arm lifts a stack of cafeteria trays weighing 62 newtons (N). It moves the trays 2 meters (m). How much work has the robotic arm performed?

• 31 J
• 64 J
• 124 J
• 186 J

Jake’s toy truck has a mass of 3 kilograms (kg). Jake pushes the truck with a force of 10 newtons (N). How much work has Jake done on the truck when he pushes it for 2 meters?

• 5 J
• 20 J
• 30 J
• 60 J

A force of 12 N is used to lift a box 0.5 meters above a floor. What amount of work was done to lift the box?

• 6.0 J
• 11.5 J
• 12.5 J
• 24.0 J

Susan and Joe push a table 18 meters down a hall by exerting a force of 200 newtons (N). What is the total amount of work done on the table?

• 1600 J
• 1800 J
• 2000 J
• 3600 J

What is Thermal Energy ?

• Hot air coming down from the upstairs
• All the kinetic energy from the movement of the particles in an object
• The thermostat making it cooler or hotter in your house
• none of the above

It takes 6.0 seconds for a pulley system to lift a crate weighing 300. N to a height of 5.0 meters. How much power is required to lift the crate?

• 360 W
• 250 W
• 10 W
• 0.1 W

What are the units of measurements of power?

• Horsepower
• J (Joules)
• W (Watts)
• N (Newtons)

What are the units of measurement of work?

• meters
• kg
• N (Newtons)
• J (Joules)