How does velocity relate to power?
If work is done faster, power is higher. If work is done slower, power is smaller. Since work is force times displacement (W=F*d), and velocity is displacement over time (v=d/t), power equals force times velocity: P = F*v. More power is seen when the system is both strong in force and fast in velocity.
How does velocity affect force?
So force is the change in (mass times velocity) with respect to time: F = d(mv)/dt. In most situations we figure mass is constant. So force is proportional to a change in velocity. (F = m dv/dt, or mass times acceleration.)
Why does power increase with speed?
This acceleration will continuously increase the body’s velocity. According to P = Fv, since the force is constant and the velocity is continuously increasing, the power required by the force will continuously increase.
How do you find velocity from power?
- Power : P = F*V.
- Force : F = P/V.
- Velocity : V = P/F.
- Where, P = Power, F = Force, V = Velocity.
How does time affect power?
The point is that for the same amount of work, power and time are inversely proportional. The power equation suggests that a more powerful engine can do the same amount of work in less time. That is, some people are capable of doing the same amount of work in less time or more work in the same amount of time.
How is velocity related to resistance?
Since resistance is inversely proportional to current, and current is proportional to drift velocity, resistance must be inversely proportional to drift velocity. This gives the result: RX=2RY.
How does velocity relate to impulse?
As mass is constant during free-weight resistance training, a greater impulse will result in a greater velocity. Therefore, as generation of force greater than the weight of the resistance increases (i.e. propulsive force; Garhammer and Gregor, 1992) higher movement velocities and/or decreased movement times result.
Does speed increase with power?
If you have a constant power source, then with increase in torque there is an increase in speed also. However, if you have an increasing power source then increase in torque may increase in speed also.
What are two ways to increase power physics?
Since power is the rate at which work is done, two ways you can increase power are: Increase the work and decrease the time for doing the work.
How does velocity affect the amount of force produced?
The graph below shows the relationship between the velocity (speed) of movement and the amount of force generated. Remember that at any velocity fast twitch fibres can produce more force. This is most dramatic at higher velocities. At zero velocity you can see the muscles can produce maximal force.
What is the effect of flow velocity on fluid pressure?
This effect causes the lowering of fluid pressure in regions where the flow velocity is increased. This lowering of pressure in a constriction of a flow path may seem counterintuitive, but seems less so when you consider pressure to be energy density.
Why is the force produced at very fast velocities low?
At very fast velocities the force you can produce is quite low as very few of the actin and myosin cross bridges have time to bind, and very few are bound at any moment. The faster you go the less force you have time to produce within the muscle.
How does velocity affect lift and drag?
The velocity used in the lift and drag equations is the relative velocity between an object and the flow. Since the aerodynamic force depends on the square of the velocity, doubling the velocity will quadruple the lift and drag. Let’s investigate the dependence of lift on velocity using a Java simulator.