mid exam mcq physics
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Questions and Answers

Select the more appropriate walking ald which has a good base of support;

  • Axillary crutches
  • Walking frame (correct)
  • Cane
  • Elbow crutch

Identify the muscle in human body where concurrent muscle force component is applicable,

  • Deltoid
  • Hamstring
  • pectoralis major (correct)
  • Biceps brachi

Identify the most appropriate anticipated direction of elbow joint movement from below scenerio

1.If biceps is contracting (EF) with a force of 100lb applied at a distance (EA) 2 inch from the axis [Elbow Joint].

2.COG of forearm and hand (R) generate a force of 10lb and lies 15 Inch(RA) from the axis [Elbow Joint]

  • Counter clockwise direction (correct)
  • Clockwise direction
  • Negative direction
  • linear direction

Choose the type of muscle contraction if the torque generated by the muscle is more than the torque generated by gravity during active elbow flexion;

<p>Concentric contraction (A)</p> Signup and view all the answers

This exists whenever two parallel forces are applied at some distance from the axis, with the resistance force applied closer to the axis than the effort force

<p>Second order of lever (B)</p> Signup and view all the answers

Identify the type of force system in effect for pectoralis major muscle when it acts on upper limb

<p>Concurrent force system (A)</p> Signup and view all the answers

Which among the following muscle where concurrent muscle force component is very effective in Human body

<p>Deltoid muscle (A)</p> Signup and view all the answers

Which among the following muscle where parallel force component is very effective in Human

<p>Hamstring (B)</p> Signup and view all the answers

Which among the following muscle is a best example for linear force system

<p>Psoas and iliacus muscles (A)</p> Signup and view all the answers

Select from the following item which does not contribute highly to the equilibrium of human beings from applied physics

<p>Flooring made up of tile (D)</p> Signup and view all the answers

Select the angle of elbow joint where translatory force components are more;

<p>10 degree flexion (A)</p> Signup and view all the answers

Select the appropriate elbow angle where the torque produced by biceps will be more

<p>at 90 degree angle (A)</p> Signup and view all the answers

Which among the order of lever that gives mechanical disadvantage to effort arm produced by human being in work place

<p>Third order lever (C)</p> Signup and view all the answers

Select the suitable angle at which the elbow joint encounters compression force

<p>0 degree extension (A)</p> Signup and view all the answers

Select the suitable angle at which the elbow joint encounters distraction force

<p>135 degree (B)</p> Signup and view all the answers

Which among the following angle is appropriate for quadriceps muscle to produce maximum torque production at knee joint

<p>90 degree (B)</p> Signup and view all the answers

Select the appropriate elbow joint angle where the rotatory force components is more

<p>90 degree elbow flexion (B)</p> Signup and view all the answers

Which among the below muscle acts at mechanical disadvantage in view of the lever principle applied to human mechanics

<p>Biceps at elbow joint (A)</p> Signup and view all the answers

Which among the following statement is true for ideal posture of human being regard to line of gravity

<p>LOG passes through the mid cervical and mid lumbar vertebrae and in front of thoracic vertebrae (A)</p> Signup and view all the answers

Which among the following posture is having a stable equilibrium

<p>Lying supine (A)</p> Signup and view all the answers

Identify the statement which is not true about equilibrium principle

<p>Lesser the friction between the supporting surface and the BOS, the more stable (D)</p> Signup and view all the answers

Select the location at which the gravity will act on any object movement around axis

<p>Centre of body mass of an object (A)</p> Signup and view all the answers

Calculate the net torque production for the below forces acting on a bone or long lever around a Joint.

i. muscle force of biceps on forearm at its attachment (Fms=120lb) Lever arm by muscle is 1 cm ii force of gravity on forearm at the COG (G=10lb) Lever arm by gravity 15 cm

<p>-30 lb (A)</p> Signup and view all the answers

Calculate the net torque production for the below forces acting on a bone and identify the type of muscle work around a Joint.

i muscle force of biceps on forearm at its attachment (Fms=150lb) Lever arm by muscle is 1 cm ii. force of gravity on forearm at the COG (G=10lb) Lever arm by gravity 15 cm

<p>Isometric contraction (A)</p> Signup and view all the answers

Calculate the net torque production for the below forces acting on a bone and identify the type of muscle work around a Joint.

i. muscle force of biceps on forearm at its attachment (Fms= 150lb) Lever arm by muscle is 1 cm

ii. force of gravity on forearm at the COG (G=5lb) Lever arm by gravity 15 cm

<p>Concentric contraction (B)</p> Signup and view all the answers

Calculate the net torque production for the below forces acting on a bone and identify the resultant direction of movement around a Joint.

i muscle force of biceps on forearm at its attachment (Fms=100lb) Lever arm by muscle is 1 cm ii.force of gravity on forearm at the COG (G= 10lb) Lever arm by gravity 15 cm

<p>Clockwise direction (A)</p> Signup and view all the answers

Which among the followings is referred to the moment arm' when net torque production is calculated;

<p>The distance from axis to the point at which muscle force acts at a bone to produce moment (A)</p> Signup and view all the answers

Choose the right answer from below Torques is calculated using the following formula T= rFsin(0) Where r stands for..

<p>Distance (r) that force lies from the axis of rotation (C)</p> Signup and view all the answers

Choose the right answer from below Torques is calculated using the following formula T= rFsin(0) Where F stands for...

<p>Magnitude of applied force (A)</p> Signup and view all the answers

Which among the followings is referred to 'the resistance arm' when net torque production is calculated;

<p>The distance from axis to the point at which gravity force acts at a bone to produce moment (B)</p> Signup and view all the answers

Which among the below structure that has high Young modulus of elasticity and low compliance in human being.

<p>Bone (A)</p> Signup and view all the answers

Identify the connective tissue structure which produces resistance to compressive forces from the followings

<p>Ground Substance (A)</p> Signup and view all the answers

Flashcards

Walking Frame

A type of walking aid with a wide base for greater stability. It provides support and balance during walking.

Concurrent Force System in Pectoralis Major

The pectoralis major is a large chest muscle that displays concurrent muscle force components. These components contribute to its powerful pulling action on the arm.

Second-Order Lever

A lever system where the effort is applied further from the axis than the resistance. This configuration provides a mechanical advantage.

Concentric Contraction

The movement of a joint in the intended direction, where muscle force is greater than the resisting force.

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Concurrent Force System

The forces that act on an object at a specific single point, converging towards the point of application.

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Concurrent Force System in Deltoid

The deltoid muscle, located in the shoulder, utilizes concurrent muscle force components effectively. These components enable versatile movement of the arm.

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Parallel Force System in Hamstrings

The hamstring muscles, located in the back of the thigh, demonstrate parallel force components in their action. Their pull helps with hip extension and knee flexion.

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Linear Force System in Psoas and Iliacus

The psoas and iliacus muscles, in the hip flexor region, act as a linear force system. Their combined action primarily contributes to hip flexion.

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Optimal Elbow Angle for Bicep Torque

The angle of the elbow joint where the bicep muscle produces the most torque or turning force.

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Third-Order Lever

A lever system where the effort is applied closer to the axis than the resistance. This configuration provides a mechanical disadvantage.

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Distraction Force at Elbow Joint

The angle at which the joint experiences a pulling force tending to move the joint surface apart.

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Compression Force at Elbow Joint

The angle at which the joint experiences a pushing force tending to push the joint surfaces together.

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Optimal Knee Angle for Quadriceps Torque

The angle of the knee joint that maximizes the torque production of the quadriceps muscle group.

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Optimal Elbow Angle for Rotatory Force

The angle of the elbow joint where the bicep muscle creates the most rotating force.

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Mechanical Disadvantage of Biceps at Elbow

The biceps muscle at the elbow joint uses a lever system where the effort is applied closer to the axis (elbow joint) than the resistance (forearm and hand). This requires more effort to move a load.

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Ideal Posture and Line of Gravity

The ideal posture where the line of gravity passes through specific points of the spine, minimizing stress and strain.

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Stable Equilibrium in Lying Supine

This posture represents a stable equilibrium, where any slight displacement results in a return to the original position.

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Center of Body Mass (COM)

The point where the gravitational force acts on an object, regardless of its position.

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Torque

The product of force and the perpendicular distance from the axis of rotation to the point where the force is applied.

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Moment Arm

The perpendicular distance between the axis of rotation and the line of action of a force.

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Resistance Arm

The distance between the axis of rotation and the point where the resistance force acts on the body.

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Young's Modulus of Elasticity

A measure of a material's stiffness, indicating its resistance to deformation under stress.

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Ground Substance's Role in Compression Resistance

The ground substance in connective tissues resists compression forces, providing structural support and buffering.

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