How to calculate the instantaneous force
Publish: 2021-04-19 21:00:21
1. ???? Explain exactly<
the elastic force (internal force) proced by elastic collision is a variable force, so we can only solve its equation about time (or collision deformation)
we need to use the knowledge of calculus
are you in college or high school?
the elastic force (internal force) proced by elastic collision is a variable force, so we can only solve its equation about time (or collision deformation)
we need to use the knowledge of calculus
are you in college or high school?
2. F = ma = m (VT VO) / T
= 80 (0-30 / 3.6) / 0.5
= - 1333 (n)
= - 133.3 (KGF)
force at the moment of impact
F '= 133.3kg force
= 80 (0-30 / 3.6) / 0.5
= - 1333 (n)
= - 133.3 (KGF)
force at the moment of impact
F '= 133.3kg force
3. The momentum theorem ∑ I can be considered= Δ P
I is impulse = ft
P is momentum = MV
the accumulation of external force in time is equal to the change of momentum, of course, t can be very small
I is impulse = ft
P is momentum = MV
the accumulation of external force in time is equal to the change of momentum, of course, t can be very small
4. Instantaneous force refers to the action time is very short, the position of the object changes very little, so we can ignore the change of various potential energy, only consider the change of kinetic energy
that is, the work done by the instantaneous force on the object is equal to the increased kinetic energy of the object.
that is, the work done by the instantaneous force on the object is equal to the increased kinetic energy of the object.
5. The initial velocity at the time of impact and the velocity at the end of impact, then the acceleration is calculated by the time of impact process, and then the force is calculated by the weight of the object
momentum can also be used for verification, but momentum verification requires advanced mathematics.
momentum can also be used for verification, but momentum verification requires advanced mathematics.
6. Instantaneous power refers to the proct of voltage and current at a certain time. If the instantaneous voltage is u (T), the instantaneous current is I (T), and the instantaneous power is p (T), then p (T) = u (T) * I (T),
for sinusoidal alternating current, P = u * I * cos φ
where u and I are the effective values of sinusoidal alternating current respectively, φ Is the phase difference between voltage and current signals.
for sinusoidal alternating current, P = u * I * cos φ
where u and I are the effective values of sinusoidal alternating current respectively, φ Is the phase difference between voltage and current signals.
7. When the direction of force and velocity is the same, P = w / T = FS / T = FV
above P is power W work f force s displacement t time, if V is instantaneous velocity, P is instantaneous power; V is the average speed and P is the average power
generally, P = f vector dot times V vector = FV * cosine of the angle between FV. F. If V is in the same direction, the cosine of the angle is 1, and P = FV
above P is power W work f force s displacement t time, if V is instantaneous velocity, P is instantaneous power; V is the average speed and P is the average power
generally, P = f vector dot times V vector = FV * cosine of the angle between FV. F. If V is in the same direction, the cosine of the angle is 1, and P = FV
8. F is the instantaneous force, which is the magnitude of the force at this instantaneous speed. If it is a uniform linear motion, then this formula can also represent the average power under the action of this force
9. Gravity is in the vertical direction
P = FV = MGV
P = FV = MGV
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