Question

The four figures below show a hand gripping a cylinder. In which of these figures will the grip exert the maximum force?

• A. A
• B. B
• C. C
• D. D

Hint:

Power grips (fingers wrapped + thumb opposition) produce far greater force than pinch grips. Object size matters: too large or too small reduces leverage.

Answer 1

The Correct Option is D

Step 1: Recall grip types and force generation.
Maximum grip force is produced in a power grip where the fingers flex around the object and the thumb counter-presses against the fingers, engaging forearm flexors and allowing a large contact area. A pinch grip (fingertips only) generates much less force.
Step 2: Compare the four figures against force principles.
- Figure A: The cylinder is too large; the fingers cannot wrap fully ⇒ reduced mechanical advantage and less thumb opposition.
- Figure B: Pinch grip with fingertips ⇒ minimal contact area and muscle recruitment.
- Figure C: Multiple flat faces reduce uniform contact; edges localize pressure ⇒ less efficient force transfer than a smooth cylinder of optimal size.
- Figure D: Fingers curl completely with the thumb locking over/against them ⇒ classic power grip with maximum contact and optimal joint angles.
Step 3: Conclude.
The configuration that most closely matches a full power grip is Figure D ⇒ \(\boxed{\text{Figure D}}\). Final Answer: \[ \boxed{\text{(D) Figure D}} \]