Mechanics Quiz

What is the formula to calculate force?

• force = mass - acceleration

• force = mass * acceleration

• force = mass + acceleration

• force = mass / acceleration

A force of 50 N is applied to an object with a mass of 10 kg. What is the acceleration of the object?

• 5 m/s^2

• 25 m/s^2

• 10 m/s^2

• 2 m/s^2

What is stress in materials?

• The absence of force or pressure in a material

• The ability of a material to withstand force or pressure

• Internal force or pressure exerted on a material

• The external force or pressure exerted on a material

A material has a cross-sectional area of 5 cm² and is subjected to a force of 100 N. Calculate the stress on the material.

• 20 N/cm²

• 2 N/cm²

• 50 N/cm²

• 10 N/cm²

What is strain in materials?

• The breaking point of a material

• The ability of a material to conduct electricity

• The color of a material

• Deformation or change in shape when a material is subjected to external forces or stress.

A material has an original length of 10 cm and is stretched to a length of 12 cm. Calculate the strain.

• 0.5

• 0.2

• 0.8

• 1.2

What is Young's modulus?

• Young's modulus is a measure of the stiffness of a material.

• Young's modulus is a measure of the hardness of a material.

• Young's modulus is a measure of the flexibility of a material.

• Young's modulus is a measure of the density of a material.

A material has a stress of 200 MPa and a strain of 0.002. Calculate the Young's modulus of the material.

• 100 GPa

• 250 GPa

• 150 GPa

• 50 GPa

What are beam reactions?

• The temperature changes that affect a beam structure.

• The vibrations experienced by a beam structure.

• The deflection of a beam structure under load.

• Forces and moments at the supports of a beam structure in response to applied loads.

A beam is supported at one end and has a load of 500 N applied at the other end. Calculate the reaction force at the support.

• 500 N

• 100 N

• 1000 N

• 0 N