GCSE Physics - Elastic Potential Energy and F = ke Equations #45

The video tutorial covers key equations related to elasticity, including the relationship between force, spring constant, and extension. It explains elastic potential energy and how energy is transferred when a spring is stretched. Through practical examples, the tutorial demonstrates how to calculate the spring constant and elastic potential energy. It also discusses the graphical representation of force against extension, highlighting the elastic limit and Hooke's Law.

What does a lower spring constant indicate about an object's elasticity?

• The object is brittle and breaks easily.

• The object is more rigid and cannot be stretched.

• The object is more elastic and easier to stretch.

• The object is less elastic and harder to stretch.

How is elastic potential energy calculated?

• Elastic potential energy equals KE squared.

• Elastic potential energy equals 1/2 K squared E.

• Elastic potential energy equals 1/2 KE squared, with only the extension squared.

• Elastic potential energy equals KE, with the whole term squared.

If a spring with a natural length of 0.6 meters stretches to 0.8 meters under a force of 14 Newtons, what is the spring constant?

• 20 Newtons per meter

• 7 Newtons per meter

• 17 Newtons per meter

• 14 Newtons per meter

What is the elastic potential energy of a spring with a spring constant of 70 N/m and an extension of 0.2 meters?

• 3.5 Joules

• 0.7 Joules

• 2.8 Joules

• 1.4 Joules

What does the gradient of a force versus extension graph represent?

• The limit of proportionality

• The total energy stored

• The spring constant

• The elastic potential energy