Question

after the crank turns 3.5 times, what will be the position of the piston within the cylinder?
a at the top
b same place
c at the bottom
d close to the bottom

Explanation:

Step1: Analyze the piston - crank motion cycle

One full turn of the crank (360 degrees) corresponds to a complete up - down (or down - up) cycle of the piston.

Step2: Calculate the position after 3.5 turns

3 full turns will bring the piston back to its original position. The additional 0.5 turn (180 degrees) will move the piston from its original position (assuming starting position, for a typical crank - piston mechanism, if we consider the motion, half - turn from the starting position which is often at the top or bottom, if we assume a simple reciprocating motion where a full turn is up - down. 0.5 turn from the starting position (say starting at the top) will move it to the bottom.

Answer:

C. at the bottom