Work and Gravitational Potential Energy

At which point does the ball has the greatest gravitational potential energy (GPE)?

• A

• G

• D

• C

• G

Tags

NGSS.HS-PS2-4

How could you increase the gravitational potential energy of an object without changing its mass or the planet's gravitational force.

• Make the object larger

• Lower the object towards the ground

• Raise the object farther off the ground

• Allow the object to roll on the ground

Tags

NGSS.MS-PS3-2

Which is the correct unit for expressing gravitational potential energy?

• Joule

• Newton

• m/s²

• meter

When an object gains graviational potential energy what objects should be in the system.

• the object being lifted

• The object being lifted and the object doing the lifting

• The object being lifted and the earth

• The object being lifted, the object doing the lifting, and the earth

Tags

NGSS.HS-PS2-4

An object is being lifted 2m with a force of 25N exerted upwards on the object. How much work is being done on the object?

• 50J

• 25J

• -50J

• 0J

Work is always done by ____________

• A person

• An object outside the system

• An object inside the system

• The Earth

Which of these scenarios is the most work done?

• A crane does work by lifting a steel beam exerting 5000N of force lifting it 5m off the ground.

• A person does work on a shopping cart by exerting a force 12N down the 10m long isle.

• A truck does work as it pulls a trailor exerting a force of 100N over 1000m as it drives down the road.

• An elevator does work by lifting some passengers up in a building exerting 3000N of force lifting them 8m.

Which object has the most graviational potential energy?

• A 1000kg car lifted 0.02m off the ground.

• A 0.5kg baseball 20m off the ground

• A 75kg weight lifted 1m off the ground

• A 12kg crate 3m off the ground.

Tags

NGSS.MS-PS3-2

A person lifts a 25kg weight off the ground 0.5m

System: The Weight, Earth

What type of work did the person do?

• Positive Work

• Negative Work

• No work

The person lowers a 25kg weight back down to the ground 0.5m.

System: The Weight, Earth

What type of work did the person do?

• Positive Work

• Negative Work

• No work