Elastic Potential Energy

Anika and Avery are working on a physics project where they need to measure the energy stored in a spring. They use a spring with a spring constant of 100 N/m and stretch it by 0.3 meters. How much elastic potential energy is stored in the spring?

• 4.5 J

• 0.04 J

• 45 J

• 0.45 J

Tags

NGSS.MS-PS3-2

Grace is working on a physics project and needs to demonstrate an example of elastic potential energy. Which of the following could she use for her demonstration?

• Compressed spring

• Inflated balloon

• Twisted hair tie

• Stretched rubber band

Tags

NGSS.MS-PS3-2

The diagram shows the same spring being stretched at different lengths using different masses. At which length does the spring have the MOST potential energy?

• length A

• length B

• length C

• length D

Tags

NGSS.MS-PS3-2

Elastic potential energy is energy stored in an object, such as a spring, due to the object being stretched or compressed. In which position is it most likely that the spring has lost its elastic potential energy?

• W

• Y

• X

• Z

When an archer fires an arrow from a traditional bow, the string of the bow does not change length. As shown in the diagram, the archer pulls back on the string (Step 1), changing the curve of the bow (Step 2). When the archer releases the string, the bow returns to its original shape (Step 3). How does the elastic potential energy in the bow change as the archer fires an arrow?

• It decreases from Step 1 to Step 2, then increases to Step 3.

• It increases from Step 1 to Step 2, then decreases to Step 3.

• It remains constant from Step 1 to Step 2, then increases to Step 3.

• It remains constant from Step 1 to Step 2, then decreases to Step 3.

Answer explanation

Elastic potential energy in an object changes as a result of bending, compressing or changing the shape of the object. The archer adds potential energy to the bow by pulling on the string and changing the bow’s shape. When the archer releases the string, the bow resumes its original shape, losing the added potential energy.

Tags

NGSS.MS-PS3-2

Which object has elastic potential energy?

• a hanging leaf

• a burning coal

• a rolling ball

• a stretched bow

This type of potential energy can be found in rubber bands and springs.

• Chemical

• Elastic

• Gravitational

Tags

NGSS.MS-PS3-2

William is using a slingshot to launch a stone. What is the formula for the elastic potential energy stored in the slingshot's rubber band?

• E = F * d

• E = m * g * h

• E = 0.5 * m * v^2

• E = 0.5 * k * x^2

Tags

NGSS.MS-PS3-2

Arjun is using a spring with a spring constant of 50 N/m in his physics project. If he compresses the spring by 0.2 meters, what is the elastic potential energy stored in the spring?

• 5 J

• 0.5 J

• 1 J

• 0.02 J

Tags

NGSS.MS-PS3-2

Olivia is using a spring with a spring constant of 80 N/m in her physics project. If she compresses the spring by 0.1 meters, what is the elastic potential energy stored in the spring?

• 0.8 J

• 1.2 J

• 0.4 J

• 0.2 J

Tags

NGSS.MS-PS3-2