Respuesta :
Answer:
1. momentum
2. energy
3. Kf = Ki + W
Explanation:
1. If the constant force is applied for a fixed interval of time (t), then the momentum of the particle will increase by an amount (at).
Force F applied for a time t is called impulse and is given as F*t which is equal to the increase or decrease in momentum of an object.
2. If the constant force is applied over a given distance D, along the path of the particle, then the kinetic energy of the particle will increase by FD.
Work-Energy principle:
The principle of work and kinetic energy states that the work done by all forces acting on a particle (the work of the resultant force) equals the change in the kinetic energy of the particle.
3. Kf in terms of Ki and Work done:
We have Ki as the initial Kinetic energy of a particle. The Kinetic energy of a body changes when some work is done on it.
Work done on the particle is given as
Work done = Force * distance
W = F.D
So, final Kinetic energy = Initial Kinetic energy + Work done
Kf = Ki + FD
Answer:
1) Velocity
2) Kinetic Energy
3) [tex]K_f = K_i + W[/tex]
Explanation:
When constant force is applied for a fixed interval of time then we have
[tex]F = ma[/tex]
[tex]a = \frac{F}{m}[/tex]
now if the force is constant then we can use kinematics
so we will have
[tex]v = v_i + at[/tex]
[tex]v - v_i = at[/tex]
so here the velocity is increased by factor of "at"
Now the constant force is applied for some given distance D
so here we have work done by the force is given as
[tex]W = FD[/tex]
now by work energy theorem we can say that the total work done by all the forces must be equal to the change in kinetic energy
[tex]K_f - K_i = FD[/tex]
As per above work energy theorem we know that
[tex]K_f = K_i + W[/tex]
