Understanding Deformation and Elasticity

What is deformation?

• A process where heat is added to a material

• A change in the shape or size of a solid due to applied force

• A type of melting process

• A phase change in a liquid

During a hot summer day, Dedi noticed that the metal fence in his backyard had expanded and bent slightly. What typically causes deformation in solids?

• Change in temperature

• Addition of color

• Application of external force

• Exposure to light

Agung is conducting an experiment to determine which material can stretch the most without breaking. He has four materials to test: rubber, plastic, dough, and steel. Which of these materials is classified as more elastic?

• Rubber

• Plastic

• Dough

• Steel

During a physics experiment, Eko and Rizky are comparing the elasticity of different materials. Eko stretches a rubber band while Rizky bends a steel rod. They observe the differences in how each material reacts. Why is steel considered more elastic than rubber?

• Steel is heavier

• Steel is softer

• Steel returns to original shape more readily

• Rubber cannot deform

Yuni is a baker who loves to experiment with different materials in her kitchen. One day, she decides to work with dough and clay for her new project. How would you classify materials like dough and clay?

• Perfectly elastic

• Inelastic

• Semi-elastic

• Highly brittle

Which type of substance returns exactly to its original form after deformation?

• Inelastic

• Viscous

• Perfectly elastic

• Semi-elastic

What happens to a spring when a load is applied?

• It shrinks permanently

• It melts

• It vibrates

• It extends depending on the force

Tensile deformation refers to:

• Compression of the spring

• Lengthening due to pulling force

• Heating the spring

• Freezing the spring

Wawan is conducting an experiment with a spring. He adds different weights to the spring and observes how it behaves. How does the extension of the spring change with increased weight?

• It decreases

• It stays constant

• It increases

• It oscillates

The restoring force of a spring acts in which direction?

• In the direction of applied force

• Perpendicular to the force

• Opposite to the direction of deformation

• At an angle to the deformation