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What is the Method used to produce stead slow increase in muscle force?
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What happens to the acceleration as you increase the mass?
As per Newton's first law of motion, if the applied force remains the same, an increase in mass will result in a decrease in acceleration. In contrast, if the acceleration were to remain the same when the mass increases, there must be a greater force applied.
Can centripetal force produce rotation?
no, but rotation can produce centripetal force
Can 100kg weight falling produce 2000 newtons of force?
Yes, but only if acceleration is increased to 20m/s^2. Without that increase a 100kg mass would exert a force of about 980.7 newtons.
When you turn a screwdriver Is the result an increase in force or an increase in distance?
Both force and distance increase. You have to use force to turn the screw from point A to point B.
Does acceleration of a object increase as force on the object increase?
Yes, increased force applied to an object results in an increase in acceleration.
In a concentration contraction the muscles shorten to produce movement?
True.
What happens to muscle force production when the muscle is too short?
Force produced is reduced, when the muscle is over-stretched or under-stretched it is weaker. Most muscles will produce max force at roughly 90 degrees.
How does the frequency of stimulation affect the amount of force generated by the muscle?
Increasing the stimulus to an isolated muscle increases the strength of a contraction. A muscle begins to contract when the stimulus is given; however, if the muscle does not finish contracting before the next stimulus hits, then the force of the contraction will increase to finish the contraction. This is known as wave summation.
Which type of change can produce stress?
Since stress is a function of Force per Area an increase in force will increase stress and vice versa. Since stress is inversely proportional to area an increase in area will create a decrease in stress and an decrease in area will produce an increase in stress. So look for the increase in force or the decrease in area in the given situation (even figuratively speaking).
Why is there no further increase in muscle contraction force above the maximum stimulus voltage?
all motor units are in action
What is multiple motor unit summation or recruitment in a muscle?
When a greater number of motor units are present in a muscle and are able to be simultaneously stimulated causing an increase in muscle force (Sherwood, and Kell 271-272).
What does muscular strength means?
The definition of muscular strength is the maximum amount of force that a muscle can exert against a form of resistance at one time. It is using muscles to exert force and refers to the amount of force those muscles produce.
What happens to the acceleration as you increase the mass?
As per Newton's first law of motion, if the applied force remains the same, an increase in mass will result in a decrease in acceleration. In contrast, if the acceleration were to remain the same when the mass increases, there must be a greater force applied.
A force that acts on an object does only when the object moves?
A force will produce acceleration when the object moves. force in the line of motion will increase the acceleration and the force opposite to the line of motion will decrease the acceleration.
Why does contractility of the cardiac muscle increase with increased filling?
It doesn't - "contractility" refers to the force generated at any given length of muscle. Therefore although the force of contraction does increase with filling, the contractility does not.The reason the force of contraction increases with filling is because filling stretches the heart muscles. Increased stretch causes an increase in force of contraction.Contractility changes because of changes in the level of intracellular calcium. This can be changed by things such as adrenalin (epinephrine), which increases contractility and β blockers, which decrease contractility.
What are two types of static stretching?
Static stretching are low-force, long duration stretches that evoke a temporary increase in muscle tension due to muscle lengthening. After 7 to 10 seconds of a low-force stretch, the increase in muscle tension activates a GTO (golgi tendon organ) response. Under GTO activation, muscle spindle activity within the stretched muscle is temporarily inhibited, allowing further muscle stretching.Dynamic stretching are low-grade muscle contractions of an antagonist (a muscle that acts in opposition of another) muscle for 6 to 15 seconds inhibit or reduce muscle spindle activity within a agonist muscle. This reduces muscle tonicity, allowing that muscle to be stretched.
What will the sympathetic nervous system do to the cardic muscle?
Sympathetic nervous system activation will increase the frequency and force of cardiac myocyte contractility
