Question

Which of the following forces are subjected to the implement moving at uniform speed?
(A) Weight (B) Pull applied by the power unit (C) Soil resistance (D) Soil buoyancy
Choose the correct answer from the options given below:

• A. (A), (B) and (D) only.
• B. (A), (C) and (D) only.
• C. (A), (B) and (C) only.
• D. (B), (C) and (D) only.

Hint:

Consider the standard three forces analysed in tillage-implement draft mechanics.

Answer 1

The Correct Option is C

When a tillage implement moves through soil at a steady speed, the net force on it is zero, so the forces acting on it are its own weight (A) pulling down, the pull or draft from the power unit (B) driving it forward, and the soil's resistance (C) pushing back against it, all balanced out at constant speed.
"Soil buoyancy" (D) isn't a real force considered in the standard draft-force analysis of tillage implements.
So the correct set is (A), (B) and (C), matching option 3.