Table of Contents
What two factors affect impulse?
The two main factors are insulation by the myelin sheath and the diameter of the axon.
Does impulse increase as time increases?
The product of average force and the time in which it is exerted is the impulse of force. It is equal to the change of momentum of an object that isn’t changing mass. If you increase the time over which the change of force happens, the impact force also decreases.
What are two ways that an impulse on an object can be increased?
Increase the average force or increase the contact time.
What does impulse force depend on?
The effect of a force on an object depends on how long it acts, as well as how great the force is. The quantity FnetΔt is given the name impulse. Impulse is the same as the change in momentum.
What increases speed of nerve impulse conduction?
myelin
By acting as an electrical insulator, myelin greatly speeds up action potential conduction (Figure 3.14). For example, whereas unmyelinated axon conduction velocities range from about 0.5 to 10 m/s, myelinated axons can conduct at velocities up to 150 m/s.
What factors affect the speed of an action potential?
Two factors that affect the speed at which action potentials propagate are (1) the diameter of the axon and (2) whether the axon is myelinated. Large-diameter axons propagate action potentials faster than do small-diameter axons.
What are some examples of impulse?
Momentum and Impulse Examples
- In baseball, a ball that is only struck with a small part of the bat is not in contact with the bat for a long period of time so the change in momentum, or impulse, is small and the ball does not travel very far.
- Air bags in cars are designed with impulse, or momentum change principles.
How does impulse equal change in momentum?
The impulse experienced by the object equals the change in momentum of the object. In equation form, F • t = m • Δ v. This impulse would cause a momentum change of 720 kg•m/s. In a collision, the impulse experienced by an object is always equal to the momentum change.
Why does impulse change with momentum?
The result of the force acting for the given amount of time is that the object’s mass either speeds up or slows down (or changes direction). The impulse experienced by the object equals the change in momentum of the object. The collision would change the halfback’s speed and thus his momentum.
How can impulse be reduced in physics?
The process of minimizing an impact force can be approached from the definition of the impulse of force: If an impact stops a moving object, then the change in momentum is a fixed quantity, and extending the time of the collision will decrease the time average of the impact force by the same factor.
What affects the speed of an action potential?
Diameter of the axon – the larger the diameter of an axon increases the rate and speed of conductance as there is less leakage of ions. 3. Temperature – The higher the temperature the faster the conductance.
What are two ways to increase impulse?
Specifically, there are three overarching ways to increase impulse buys. Product Placement. Perhaps the biggest factor in impulse buying is product placement. Where you place the product you’re trying to sell has a major impact on your ability to increase sales.
Impulse is directly related to momentum because impulse is a term describing an object’s change in momentum. In other words, if an object changes speed, then its momentum changes. By definition this measurable quantity of momentum changing is the impulse of the object.
What could be described as impulse equals change in momentum?
In a collision, objects experience an impulse; the impulse causes and is equal to the change in momentum. Consider a football halfback running down the football field and encountering a collision with a defensive back.
Does impulse equal to momentum?
Impulse is a quantity that is closely related to momentum . When an object has a momentum , and a force is applied for an amount of time, the momentum can change to a new value . The impulse-momentum theorem states that the impulse is equal to this change in momentum.