Mechanical Systems

Question 1

What is a crank?

Answer 1

A part of an axle or shaft that has been bent out at right angles.

Question 2

Name 4 movements that machines use.

Answer 2

1. Linear: one direction.
2. Reciprocating: forward & backward/up & down.
3. Circular: circle.
4. Oscillating: forward & backward on a fixed axis in a curve/arc.

Question 3

What is a pulley?

Answer 3

A wheel with a grooved rim around which a cord passes.

Question 4

Name 5 forces that can act on a structure.

Answer 4

1. Torsion: twisting.
2. Tension: stretching.
3. Bending: bendnig.
4. Shearing: tearing.
5. Compression: squashing/pushing.