Two objects a and B with the same initial kinetic energy act on a and B respectively with constant force F1 and F2 to make them stop at the same time and compare the size of F1 and F2

Let the initial kinetic energy of a be EA, the mass of a be M1, and the velocity of a be v1
The initial kinetic energy of B is EB, the mass of B is m2, and the velocity of B is v2
Then EA = m1v1 ^ 2 / 2 EB = m2v2 ^ 2 / 2
Ea=Eb
So M1 / m2 = (V2 / V1) ^ 2
The acceleration of a is A1 = F1 / M1
The acceleration of B is A2 = F2 / m2
t1=v1/a1 t2=v2/a2
t1=t2
F1 / F2 = √ (M1 / m2)
Therefore, the quality of large, the need for force
It can also be based on e = P ^ 2 / 2m (P is momentum)
Ft = P (impulse theorem)
Judge

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