Final answer:
Power grip is used for strength and involves the whole hand, ideal for forceful tasks, while precision grip is for control, involving delicate finger movements for detailed tasks.
Step-by-step explanation:
To differentiate between power and precision grip, we must consider the type of hold and the intended use for each. A power grip is used when strength and force are required, engaging more of the hand, such as the entire palm and fingers to grasp an object firmly, ideal for tasks that need substantial force or torque, similar to how a ruler might snap back with force.
On the other hand, a precision grip involves using the fingers in a more fine-tuned manner to achieve detailed and delicate tasks, focusing on control rather than force. This is comparable to making precise and accurate measurements, where the goal is to have a small variance between measurements (precision) and to be as close to the actual or known value as possible (accuracy).