Question 1: Define 'work done' in the context of physics and explain its significance in medical procedures such as physiotherapy or surgical equipment.

Answer: Work done is the transfer of energy when a force causes displacement. In medical procedures, it relates to how energy is transferred to tissues or devices during treatments like physiotherapy or surgical operations.

Question 2: Describe how the concept of work done applies when a patient uses a medical exercise device that applies a force to move a limb.

Answer: Work done occurs when the device exerts a force on the limb causing displacement, transferring energy from the device to the limb to aid recovery.

Question 1: A physiotherapy machine applies a force of 50 N to move a patient's limb through a displacement of 0.3 m. Calculate the work done by the machine.

Answer: Work done = Force × Displacement = 50 N × 0.3 m = 15 Joules

Question 2: A surgical robot exerts a force of 200 N to manipulate tissue over a distance of 0.05 m. What is the work done during this operation?

Answer: Work done = 200 N × 0.05 m = 10 Joules

Question 1: Outline a simple experiment to measure the work done by a medical device that applies force to a patient's limb. Include variables to control and safety precautions.

Answer: An experiment could involve applying a known force with a device to move a limb through a measured distance, using a force sensor and displacement measurement. Variables to control include force magnitude and movement distance. Safety precautions involve ensuring the force is within safe limits and the patient is comfortable throughout.

Question 1: A motorised wheelchair uses a motor exerting a force of 60 N to move the chair 5 meters. The motor consumes 300 Joules of energy during the movement. Calculate the work done and analyse whether the energy consumption aligns with the work done.

Answer: Work done = Force × Distance = 60 N × 5 m = 300 Joules. The energy consumed matches the work done, indicating efficient energy transfer without significant losses.

Question 1: Explain how the concept of work done is crucial in designing energy-efficient medical devices such as infusion pumps or ventilators. Include considerations of energy transfer and safety.

Answer: Work done is essential in ensuring that medical devices transfer just the right amount of energy to perform their functions efficiently. In infusion pumps, controlled work done ensures accurate drug delivery without energy wastage. In ventilators, precise energy transfer maintains effective respiration support while preventing tissue damage. Designing these devices requires understanding energy transfer, minimising energy losses, and ensuring safety through controlled force and displacement.

Question 1: Describe how work done relates to the energy transfer involved in MRI scans and the safety measures needed to manage this energy transfer.

Answer: In MRI, work done involves transferring energy to align hydrogen nuclei in the body using strong magnetic fields and radio waves. Proper management of energy transfer is crucial to prevent tissue heating or damage, requiring safety measures like controlled magnetic field strength and exposure time.