Final answer:
The impact test is used to determine the toughness of a material under shock loading.
Step-by-step explanation:
The test used to determine the toughness of a material under shock loading is the impact test. This test involves subjecting a sample of the material to a sudden impact and measuring the amount of energy absorbed before the material breaks.
For example, steel is known for its high toughness, as it can absorb a large amount of energy without fracturing under impact.