Unit 7 Mechanical Principles - Multiple Choice Questions

A simply supported beam supports a single load at a single point along its length. What is the formula to calculate the support reaction at R1?

• R1 = (F x L1) / (L1 + L2)

• R1 = (F x L1) / (L2)

• R1 = (F x L2) / (L1)

• R1 = (F x L2) / (L1 + L2)

The energy possessed by a flywheel because of its rotary motion is an example of:

• Braking force

• Rotational kinetic energy

• Gravity

• Tractive effort

In which of the following force systems do all forces pass through a single point?

• Concurrent

• Kinetic

• Non-concurrent

• Coplanar

What is acceleration?

• Change in the velocity of an object over time, measured in m/s²

• Change in the velocity of an object over time, measured in m/s

• The motion of an object that is moving very fast

• Change in the position of an object over time, measured in m/s

Newton’s first law states … ?

• Energy cannot be created or destroyed, just changed between different forms

• An object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force

• An object is in equilibrium if the forces acting on it are zero

• The acceleration of an object produced by a force is proportional to the mass of the object in the direction opposite to the force

Which of the following statements is true for a simply supported beam with uniformly distributed loading?

• The maximum value of the shear force is at the midpoint of the beam

• The bending moment diagram will be a sloping straight line passing through the midpoint

• The maximum value of the bending moment will be experienced at the two ends of the beam

• The reaction forces at each end of the beam will be the same

Which of the following is an example of a contact force?

• Magnetic

• Electrostatic

• Friction

• Gravitational

What is Newton’s second law in equation form?

• F = ma

• Force of friction = ma

• p = mv

Which statement about frictional resistance is correct?

• It is a non-contact force

• It works in the same direction as the motion of the object

• It is the same irrespective of the materials used to make the surfaces

• Types include sliding, rolling and static friction

In which units is power measured?

• Joules

• Newtons

• Newton metres

• Watts