Problem l State true or false Please circle your answer 1 No

Problem l: State true or false. Please circle your answer. 1. Normal force is a force that acts perpendicular to the area 2. Bending moment is developed when the external loads tend to twist the body 3. Change in length of a body per unit area is called as strain 4. For most ductile metals, modulus of toughness is higher than modulus of resilience 5. For most metals, the stress-strain relationship is linear within elastic zone 6. Higher modulus of elasticity is an indicator higher yield strength (6 points) True / False True/ False True / False True / F True/False True / False alse

Solution

1. True : Normal force acts normal/ perpendicular to the area.

2. False: Bending moment is Load x lever arm. Torsional force cause twisting.

3. False: Change in length pet unit length is called strain.

4. TRUE: modulus of toughness if higher than modulus of resilience for ductile metals.

5. True: in elastic zone stress is directly proportional to strain.

6. False: higher modulus of elasticity does not mean higher yield strength. It just indicate that for a large value of stress small stress I\'d generated.